A/c-Heater System - Automatic Ford Thunderbird IX

DESCRIPTION

The Electronic Automatic Temperature Control (EATC) automatically adjusts system to maintain an operator selected in-vehicle temperature. The control assembly uses a microcomputer to analyze 4 major inputs: Temperature and mode selection, in-vehicle temperature, ambient temperature and engine temperature.

The microcomputer determines the correct conditions for 6 control outputs: A/C compressor clutch engagement, blower speed, blend door position, mode door position, panel defrost door position, and fresh air/recirculation door position.

Small DC electric motors are used to operate 4 air doors. A feedback circuit is used in each motor so that the computer can identify the door's position. A/C compressor clutch and blower motor are controlled through the Blower Speed Controller (BSC).

System Block Diagram. Scheme 3

CONTROL PANEL

The Electronic ATC control panel assembly consists of 9 mode push buttons, a Vacuum Fluorescent Display (VFD) and 7 Light Emitting Diodes (LEDs). The set temperature can be raised or lowered in 1° increments (between 65°F and 85°F) or (18°-29°C) through the use of "WARMER" or "COOLER" mode push buttons.

On Continental and Mark VII, temperature settings will be displayed in Fahrenheit. Temperature setting can be changed to Celsius by depressing "MILES/KM" button on vehicle's message center.

On Cougar and Thunderbird, by depressing "ENGLISH/METRIC" button on electronic cluster, the display changes from Fahrenheit to Celsius. On all models, depressing respected button changes display back to Fahrenheit. The remaining 7 mode push buttons are "OFF", "ECON", "LO AUTO", "AUTO", "HI AUTO", "MIX" and "DEFROST". (Scheme 4)

The control panel assembly performs the following functions

1. Processes data from the operator's input to the control panel, from in-vehicle, ambient and engine temperature sensors and from 4 actuator position sensors.
2. When turned on, remembers temperature and mode selected before last shut-off.
3. Provides continuous position control of the blend and mode doors.
4. Provides 2-position control of the "PAN/DEF" and "FRESH AIR/REC" actuators.
5. Provides a continuously variable blower signal which is amplified by the solid state BSC module to control blower voltage.
6. Provides an A/C clutch on-off signal which is amplified and delivered to the pressure switch by BSC module.

EATC Control Panel (Note location of "Cooler" and "Warmer" mode buttons.). Scheme 4

Ambient Temperature Sensor

Ambient temperature sensor is located inside the outside air intake duct. Sensor contains a thermistor (temperature sensitive resistor) which measures outside air temperature and inputs signal to the EATC control assembly.

In-Vehicle Sensor

In-vehicle sensor is located behind instrument panel above glove box on Continental models. On Cougar and Thunderbird, in-vehicle sensor is located behind instrument panel above storage bin or graphic equalizer, if equipped.

On Mark VII models, in-vehicle sensor is located behind the warning lamp module, in upper right hand side of instrument cluster. Sensor contains a thermistor (temperature sensitive resistor) which measures inside vehicle air temperature and inputs signal to the EATC control assembly.

ASPIRATOR

The aspirator is located on the evaporator case, at the blower motor housing outlet. Aspirator is connected by a hose to the in-vehicle temperature sensor. It is designed to create a slight vacuum at its elbow when air from the blower motor flows through it.

The in-vehicle sensor hose is connected to this elbow, which results in air from the passenger compartment being pulled through the sensor grille and across sensor. This allows the in-vehicle sensor to input a signal to the microprocessor based upon true in-vehicle air temperature.

BLOWER SPEED CONTROLLER

Blower speed controller is attached to the evaporator lower case. It converts low current signals from the electronic control assembly to a high current, variable ground feed to the blower motor. Blower motor speed is variable. It is controlled by the electronic control assembly software and blend-air door actuator position. A delay function provides a gradual increase or decrease in blower motor speeds under all conditions.

A power transistor circuit is also contained in the blower motor control unit. It supplies voltage to the clutch cycling pressure switch, which supplies voltage to engage the A/C compressor clutch.

CONTINUOUS POSITION ACTUATORS

The continuous position actuators operate the blend door and the floor/panel mode door. These actuators are identical and therefore completely interchangeable, independent of function or mounting location. They operate in both the clockwise and counterclockwise directions and will stop at any position, within their 180° operating range, as directed by the signals from the control assembly.

Operation

EATC system has a built-in diagnosis system to display error code on control assembly. The control assembly will detect some faults during normal operation and has the capability to self-test system for other faults. To activate self-testing mode, depress "OFF", "AUTO" and "DEFROST" mode buttons simultaneously and then depress "A/C" button within 2 seconds.

Normal operation is stopped when system is in self-test mode. To exit self-test mode, depress "COOL" button. In-vehicle temperature should be more than 50°F (10°C) for error codes to valid. Refer to Fig. (Scheme 5) for connector and pin numbers.

EATC Testing Connectors. Scheme 5

Code 01 - Blend Door Actuator

1. If 5 appears along with error code 01, disconnect J-1 connector from control head. Turn ignition off. Restart system. Enter self-test. If 5 still appears on display, replace control assembly. If 5 does not appear, go to step 8).
2. If 1 appears on display in step 1), disconnect both connectors from control assembly. Connect a jumper wire from pin No. 7 of connector J-1 to pin No. 8 of connector J-2. Also connect jumper wire from pin No. 8 of connector J-1 to pin No. 4 of connector J-2. Turn ignition switch to "RUN" position. Actuator should operate. Turn ignition off. Remove jumper wires.
3. Connect jumper wires from pin No. 7 of connector J-1 to pin No. 4 of connector J-2. Also connect a jumper wire from pin No. 8 of connector J-1 to pin No. 8 of connector J-2. Turn ignition switch to "RUN" position. Actuator should operate.
4. If actuator operates in steps 2) and 3), reconnect control assembly connectors. Retest system. If system is not okay, using an ohmmeter, measure the resistance between pins No. 4 and No. 5 of connector J-1.
5. Reading should be 500-600 ohms. Check resistance between pins No. 4 and No. 2. Reading should be 75-550 ohms. Check resistance between pins No. 5 and No. 2. Reading should be 200-600 ohms.
6. If readings are okay, replace control assembly. If readings are not as specified, check wiring harness and connectors for continuity. If wiring harness and connectors are okay, replace actuator. If wiring harness and connectors are not okay, repair or replace wiring harness.
7. If in steps 2) and 3), actuator did not operate, check wiring harness and connectors for continuity. If okay, replace actuator and retest system. If not okay, repair or replace wiring harness.
8. If in step 1), 5 does not appear, reconnect control assembly connector and disconnect actuator connector. Turn ignition off, then turn ignition switch to "RUN" position. Restart system. Enter self-test. If 5 is displayed, repair or replace wiring harness. If 5 does not appear, replace actuator.

Code 02 - Floor/Panel Door Actuator

1. If 6 appears with error code, disconnect control assembly connector J-1. Turn ignition off, then turn ignition switch to "RUN" position. Enter self-test. If 6 still appears, replace control assembly. If 6 does not appear, go to step 2).
2. Reconnect control assembly connector. Disconnect actuator connector. Turn ignition off, then turn ignition to "RUN" position. Enter self test. If 6 appears, repair or replace wiring harness. If 6 does not appear, replace actuator.
3. If in step 1), 2 was displayed, disconnect both control assembly connectors. Connect jumper wires between pin No. 6 of connector J-1 to pin No. 8 of connector J-2 and pin No. 9 of connector J-1 to pin No. 4 of connector J-2. Turn ignition to "RUN" position. Actuator should operate. Turn ignition off.
4. Disconnect jumper wires. Reconnect jumper wires between pin No. 6 of connector J-1 and pin No. 4 of connector J-2 and pin No. 9 of connector J-1 to pin No. 8 of connector J-2. Turn ignition switch to "RUN" position. Actuator should operate.
5. If actuator operates in steps 3) and 4), reconnect control assembly connectors. Retest system. If system is not okay, disconnect control assembly connector J-1. Using an ohmmeter, measure resistance between pins No. 4 and No. 5. Reading should be 500-600 ohms.
6. Check resistance between pins No. 13 and No. 4. Reading should be 75-550 ohms. Check resistance between pins No. 13 and No. 5. Reading should be 200-600 ohms.
7. If readings in step 5) and 6), are as specified, replace control assembly. If readings are not as specified, check wiring harness and connectors for continuity. If okay, replace actuator. If not okay, repair or replace wiring harness.
8. If in step 4), actuator does not operate, check wiring harness and connectors for continuity. If okay, replace actuator and retest system. If not okay, repair or replace wiring harness.

Code 03 - Panel/Defrost Door Actuator

1. If 7 is displayed with error code 03, disconnect pin No. 9 from control assembly connector J-2. Leave connector connected. Turn ignition off, then turn to "ON" position. Enter self-test.
2. If 7 is still displayed, replace control assembly. If 7 is not displayed, reconnect wire. Disconnect actuator connector. Turn ignition off, then turn to "RUN" position. Enter self-test. If 7 is still displayed, repair or replace wiring harness. If 7 is not displayed, replace actuator. Retest system.
3. In step 1), 3 is displayed and door does not operate, set control to "HI" "AUTO" position. Disconnect control assembly connector J-2. Blower should still be operating. Connect jumper wires from pin No. 8 to pin No. 9 and pin No. 4 to pin No. 10 of connector J-2. If actuator moves from panel to defrost or defrost to panel within 10 seconds, reconnect control assembly. Enter self-test.
4. If in step 3), system is does not operate, replace control assembly. In in step 3), actuator does not move in either direction, check to see if actuator is restricted. If restriction is external, clear and retest. If restriction is internal, replace actuator.
5. If in step 1), 3 is displayed and door operates continuously, check for open circuit between panel/defrost actuator and pin No. 3 of connector J-2. If open circuit is found, repair and retest. If circuit is okay, replace actuator.

Code 04 - Outside/Recirculation Air Door Actuator

1. If 8 is displayed with error code 04, disconnect control assembly connector J-1. Turn ignition switch to "OFF" position, then to "ON" position. Enter self-test.
2. If 8 is still displayed, replace control assembly. If 8 is not displayed, reconnect control assembly connector J-1. Disconnect actuator connector. Turn ignition switch to "OFF" position, then to "ON" position. Enter self-test. If 8 is still displayed, repair or replace wiring harness. If 8 is not displayed, replace actuator.
3. If in step 1), 4 is displayed and door does not drive, disconnect connectors J-1 and J-2 from control assembly. Connect positive battery voltage to pin No. 1 and negative to pin No. 3 of control assembly connector J-1. Using jumper wires, connect pin No. 1 of connector J-1 to pin No. 8 of connector J-2 and pin No. 3 of connector J-1 to pin No. 4 of connector J-2.
4. If in step 3), actuator goes from fresh to recirculation or vice versa in less than 10 seconds, reconnect control assembly connectors. Retest system. If system still does not operate, replace control assembly.
5. If in step 3), actuator does not operate, using an ohmmeter, check continuity between pins No. 1 and No. 3 of connector J-1. If continuity is less than 100 ohms, replace actuator. If continuity is 100 ohms or more, check actuator connectors. If connectors are okay, replace actuator.
6. If in step 3), actuator operates but doesn't go from fresh to recirculation or vice versa in less than 10 seconds, check for restriction. If the restriction is external, clear and retest. If the restriction is internal, replace the actuator. In both cases, retest the system.
7. If in step 1), 4 is displayed with error code, check for open circuit between outside/recirculation door actuator and pin No. 12 of connector J-2. If circuit is okay, replace actuator. If circuit is not okay, repair and retest.

Code 05 - Blend Actuator Current

See CODE 01 - BLEND DOOR ACTUATOR test.

Code 06 - Floor/Panel Actuator Current

See CODE 02 - FLOOR/PANEL DOOR ACTUATOR test.

Code 07 - Panel/Defrost Actuator Current

See CODE 03 - PANEL/DEFROST DOOR ACTUATOR test.

Code 08 - Outside/Recirculation Air Actuator Current

See CODE 04 - OUTSIDE/RECIRCULATION AIR DOOR ACTUATOR.

Codes 09 Or 88 - No Faults Found

1. When error code 09 or 88 appears, check all sensors, actuators, connectors and linkage for damage or misalignment.
2. To check clutch operation, turn ignition on. Connect a jumper wire between pin No. 6 and pin No. 4 on blower motor speed controller. If clutch engages, and does not blow fuse, set control to "AUTO" position.
3. Using a voltmeter, check voltage between pin No. 2 and ground of blower motor speed controller. If less than 8 volts, replace blower motor speed controller. If voltage is 8 volts or more, using an ohmmeter, check continuity between pin No. 5 of blower motor speed controller and pin No. 11 of control assembly connector J-2.
4. If there is continuity, replace control assembly. If there is no continuity, repair circuit and reactivate self-test system.
5. In step 2), clutch did not activate, check voltage at pin No. 6 of blower motor speed controller using a voltmeter. If voltages zero, check battery circuit. If voltage is greater than 10 volts, repair or replace compressor clutch.
6. To check blower operation, set control assembly to "AUTO" mode, with engine running. Set temperature setting to 60°F (15°C). If blower only operates at high speed, set control setting to 90°F (32°C), with control in "AUTO" position. Disconnect Cold Engine Lockout Switch (CELO).
7. If blower only operates in high speed, replace CELO switch. If blower does not operate, disconnect connector J-2. Using an ohmmeter, check resistance between pin No. 6 on connector J-2 and ground. If there is no continuity, replace control assembly. If there is continuity, repair wiring harness.
8. If in step 6), blower did not operate, check fuse. If fuse is okay, and blower still does not operate, ground Orange/Red wire at blower connector. If blower does not operate, replace blower motor. If blower operates in high speed only, ground pin No. 1 at blower motor speed connector.
9. If blower does not operate, replace blower speed controller. If blower operates at high speed only, ground pin No. 5 of connector J-2. If blower operates at high speed only, replace control assembly. If blower does not operate, repair wiring harness.
10. If blower operates at high speed only, disconnect connector J-2. Short pins No. 8 and No. 5 of connector J-2. If blower turns off, replace control assembly. If blower still operates at high speed, replace blower controller.
11. If blower speed, operates in 1 position only, disconnect connector J-2. Using a jumper wire, connect pins No. 5 to No. 4. If blower operates at high speed, replace control assembly. If blower stays at same speed, replace blower speed controller.
12. If clutch does not disengage when system is in "OFF" or "ECON", disconnect connector J-2. If clutch disengages, replace control assembly. If clutch stays engaged, replace blower speed controller.

Code 10 - No Faults Found

If error code 10 appears with any other codes, ignore it. If error code 10 appears alone, see error code 88 for testing.

Code 11 - Clutch Signal Low

Using a voltmeter, check voltage at pin No. 2 on blower speed controller connector. System setting should be in "AUTO" mode. If voltage is 6-7 volts, replace control assembly. If voltage is less than 6 volts, replace blower speed controller.

Scheme 6

1. If error code 12 appears, disconnect control assembly connectors J-1 and J-2. Using an ohmmeter, check ambient sensor resistance between pins No. 10 and No. 14 of connector J-1. (Scheme 6) If resistance is not as specified, check for short in wiring circuit. If wiring is okay, replace ambient sensor. (Scheme 6): Checking Ambient Sensor Resistance
2. If ambient sensor is okay, measure in-vehicle sensor resistance between pins No. 2 and No. 7 of connector J-2. (Scheme 7) If resistance is not as specified, check wiring circuit. If wiring circuit is okay, replace in-vehicle sensor. If resistance is okay, replace control assembly.

Checking In-Vehicle Sensor. Scheme 7

Code 14 - Control Assembly Problem

If error code 14 appears, replace the control assembly.

Code 15 - Blower Motor Inoperative

If error code 15 appears, using a voltmeter, measure voltage between pin No. 1 of blower controller and pin No. 5 of connector J-2. System setting should be in "HI"/"AUTO" mode. If voltage is more than 10 volts, replace control assembly. If voltage is 10 volts or less, replace blower controller.

A/C LINES

Note. To remove A/C lines, special tools are required to disconnect couplings. There are different size tools, for various A/C lines. Always use proper size when disconnecting A/C line.

Removal

Discharge refrigerant from A/C system using approved refrigerant recovery/recycling equipment. Insert tool onto A/C line coupling. Close tool and push tool into cage to release female fitting from garter spring. Pull coupling male and female fittings apart. Remove tool from A/C line. (Scheme 8)

Disconnecting A/C Line Coupling. Scheme 8

Installation

Ensure garter spring is in coupling and is not damaged. If garter spring is damaged, replace garter spring. Install new "O" rings and push couplings together with a slight twisting motion. Ensure coupling is engaged and garter spring is over flared end of female fitting. (Scheme 9)

Connecting A/C Line Coupling. Scheme 9

Removal & Installation

1. Remove air inlet duct and blower housing assembly from vehicle. (Scheme 10) Remove 4 blower plate mounting screws and remove blower motor and wheel assembly from housing. Do not remove mounting plate from motor.
2. Remove blower wheel from motor shaft. To install, reverse removal procedure, installing blower wheel 3 1/2" to 3 5/8" (89 to 92 mm) from blower mounting plate.

Exploded View of Blower Motor Assembly. Scheme 10

1. Discharge refrigerant from A/C system using approved refrigerant recovery/recycling equipment. Disconnect A/C compressor clutch electrical connector. Disconnect A/C lines at compressor. Cap A/C lines and compressor. Remove 3 A/C compressor front mounting bolts.
2. Remove 2 A/C compressor rear mounting bolts. Remove A/C compressor and rear bracket from vehicle as a unit. Remove rear bracket from A/C compressor. Reverse procedure for installation. Evacuate and recharge A/C system. Test system for proper operation.

1. Discharge refrigerant from A/C system using approved refrigerant recovery/recycling equipment. Disconnect and remove battery. Disconnect refrigerant lines at condenser. Both lines are connected with spring-locked couplings.
2. Attach special tool (T81P-19623-G) to release spring. Close tool around coupling and push into cage toward condenser. Pull hose away from condenser and unclamp tool from disconnected coupling.
3. Remove 4 bolts attaching condenser to radiator support. Remove condenser. To install, reverse removal procedure. Use new "O" rings lubricated with clean refrigerant oil. Charge A/C system.

1. Disconnect negative battery cable. Discharge refrigerant from A/C system using approved refrigerant recovery/recycling equipment. Remove air cleaner. Disconnect heater hoses from heater core. Plug heater hoses. Disconnect electrical connector from switch on receiver-drier.
2. Disconnect A/C lines at evaporator core. Plug A/C lines. Remove receiver-drier. Remove steering column cover from instrument panel. Remove left and right instrument panel sound insulators. Remove left and right cowl trim panels. Remove ashtray and receptacle from instrument panel. Remove 2 lower instrument panel to floor brace mounting screws. Remove steering column shroud.
3. Disconnect transmission indicator cable from steering column. Remove instrument panel pad. Remove steering column to brake pedal support retaining nuts. Remove instrument panel to brake pedal and steering column support mounting nut. Remove instrument panel mounting screws. Remove instrument panel.
4. Disconnect electrical connectors from instrument panel. Disconnect blower motor electrical connector. Disconnect blower motor speed controller electrical connector. Disconnect EATC sensor hose from evaporator case. Disconnect EATC electrical connector.
5. Disconnect radio antenna cable from radio. Disconnect evaporator case retaining strap. Remove 3 evaporator case mounting screws. Remove evaporator case. Reverse procedure for installation.

Exploded View of Evaporator Case Assembly. Scheme 11

1. Disconnect negative battery cable. Discharge refrigerant from A/C system using approved refrigerant recovery/recycling equipment. Remove air cleaner. Drain coolant from radiator. Remove heater hoses from heater core. Plug heater hoses and heater core tubes. Disconnect electrical connector from receiver-drier.
2. Disconnect A/C lines from receiver-drier. Cap A/C lines. Remove receiver-drier bracket mounting bolts. Remove receiver-drier. Remove steering column cover from instrument panel. Remove left and right instrument panel sound insulators. Remove left and right side cowl trim panels.
3. Remove right finish panel from instrument panel. Remove console assembly. Carefully pry defroster grille from instrument panel and remove. Remove lower instrument panel to floor brace screw. Remove steering wheel shroud. Disconnect transmission indicator cable from steering column.
4. Remove steering column to brake pedal support retaining nuts. Allow steering column to lay on front seat. Remove instrument panel to brake pedal and steering column support attaching nut. Remove instrument panel mounting screws. Remove instrument panel.
5. Disconnect electrical connectors from instrument panel. Disconnect blower motor and blower speed controller electrical connectors. Disconnect EATC sensor hose from evaporator case. Disconnect EATC connectors from control assembly.
6. Disconnect radio antenna cable from radio. Disconnect rear seat duct from floor duct. Remove 3 evaporator mounting screws. Remove evaporator case. Reverse procedure for installation.

Remove evaporator case. See EVAPORATOR CASE under REMOVAL & INSTALLATION in this article. Remove air inlet duct and blower housing from evaporator case. Remove 7 screws and 6 snap clips retaining evaporator case halves together. Separate evaporator case halves. Remove evaporator core from case.

Reverse procedure for installation. Evacuate and recharge A/C system. Test system for proper operation.

HEATER CORE

Note. These procedures are for vehicles with air conditioning systems only. For replacement on vehicles equipped with heater systems, see the HEATER article in this section.

1. Remove instrument panel and evaporator case assembly. Remove 5 screws attaching heater core cover to top of evaporator case. Remove heater core cover.
2. Lift heater core and seals from evaporator case. Remove 2 seals from heater core tubes. To install, reverse removal procedure.

Discharge refrigerant from A/C system using approved refrigerant recovery/recycling equipment. Disconnect suction line from compressor. Cap line and compressor. Disconnect and remove inlet tube. Cap A/C line. Disconnect electrical connector from A/C clutch cycling switch on receiver-drier. Remove receiver-drier to bracket mounting screws. Remove receiver-drier.

Reverse removal procedure for installation. Install new "O" rings at connections. Evacuate and recharge A/C system. Check system for proper operation.

CLUTCH CYCLING PRESSURE SWITCH

Note. Discharging the A/C system is not necessary because switch is in a Schrader valve type of fitting.

Disconnect wiring harness from pressure switch. Unscrew pressure switch from accumulator. To install, reverse removal procedure. Tighten switch finger tight only.

1. Disconnect battery ground. On Continental, remove ashtray receptacle and 4 screws attaching center finish panel to instrument panel at ashtray opening. On Cougar and Thunderbird, remove 4 screws attaching center finish panel to instrument panel. On Mark VII, remove right hand finish panel attaching screws.
2. On both models, pull lower edge of finish panel away from instrument panel. Disengage upper tabs of finish panel from instrument panel. Remove finish panel.
3. Remove 4 screws attaching control panel to instrument panel. Slide control panel out from instrument panel opening.
4. Disconnect 2 wiring harness connectors from back of control panel. To install, reverse removal procedure.

FIXED ORIFICE TUBE

Note. To replace fixed orifice tube, the high pressure refrigerant line must be replaced. The fixed orifice tube is an integral part of refrigerant line.

1. Discharge A/C system using approved refrigerant recovery/recycling equipment. Disconnect condenser end of refrigerant line which is connected with spring-locked couplings.
2. Attach special tool (T81P-19623-G) to release spring. Close tool around coupling and push into cage toward condenser.
3. Pull hose away from condenser and unclamp tool from disconnected coupling. Disconnect other end of refrigerant line from evaporator tube end fitting.
4. To install new refrigerant line, use new "O" rings lubricated with refrigerant oil. NOTE: Do not use standard "O" rings in spring lock couplings. Use only E35Y-19D690-A "O" rings.
5. Install new garter spring if damaged or missing. Clean refrigerant line fittings. Connect end of refrigerant line to evaporator tube end fitting.
6. Lubricate condenser end fittings with refrigerant oil. Push refrigerant line fitting into condenser line with a slight twisting motion.
7. Make sure garter spring is over flared end of refrigerant line to ensure coupling engagement. Charge A/C system.

Disconnect negative battery cable. Remove instrument panel pad. Disconnect in-vehicle sensor electrical connector. Remove in-vehicle sensor mounting screws. Rotate aspirator hose clockwise and remove from in-vehicle sensor. Remove sensor. Reverse procedure for installation.

Disconnect negative battery cable. Remove instrument panel center finish panel. Remove 2 in-vehicle sensor mounting screws. Carefully disconnect aspirator hose from in-vehicle sensor. Disconnect electrical connector from in-vehicle sensor. Remove in-vehicle sensor. Reverse procedure for installation.

Disconnect negative battery cable. Remove instrument cluster finish panel. Disconnect aspirator hose from in-vehicle sensor. Disconnect electrical connector from in-vehicle sensor and warning lamp module. Remove 2 in-vehicle sensor mounting screws. Remove in-vehicle sensor. Reverse procedure for installation.

Remove blower motor housing. Remove 2 ambient sensor mounting screws. Remove ambient sensor. Reverse procedure for installation.

EATC Wiring Diagram. Scheme 12