Wiper/washer System Nissan Pulsar N13

DESCRIPTION & OPERATION

All models are equipped with a 2-speed or intermittent wiper system. Hatchback and station wagon models are equipped with a rear wiper/washer system.

WIPER MOTOR

All wiper motors include an integral park switch inside the motor housing. The motor cover can be removed and the switch adjusted if wipers do not park correctly. Some models have an externally mounted circuit breaker to protect the wiper motor.

INTERMITTENT AMPLIFIER

All models except Maxima, 200SX and 300ZX use an intermittent amplifier to control the delayed wiper cycle. The amplifier is a solid-state unit which interrupts current flow to the motor. The time delay is either fixed or adjustable with a knob at the end of the wiper stalk.

All Maxima, 200SX and 300ZX models have a Time Control Unit which controls the delayed wiper cycle. This unit also operates the clock, turn and hazard flashers, seat belt chimes and other circuits.

All models have windshield washer systems. A separate pump is used for the rear washer. On all models except Maxima, a common reservoir is used for both washer systems. Maxima models have a rear washer reservoir mounted in luggage compartment.

Scheme 1

WIPER RELAY TEST

Connect a 12-volt power source to wiper relay. Connect positive lead to terminal No. 5. Connect negative lead to terminals No. 1 and 3. Connect a test light between terminals No. 2 and 4. Ground terminal No. 6. Test light should illuminate if relay is working properly.

1. Remove amplifier from vehicle or position so jumper wires can be connected to terminals. Use care to prevent improper connections since amplifier can be damaged.
2. Connect test light and battery to terminals. (Scheme 2), (Scheme 3) and (Scheme 4). Correct test procedures must be used depending on vehicle being tested.

Sentra

Connect test leads to amplifier. (Scheme 3) Test light should come on when negative lead wire "A" is connected. Momentarily connect lead wire "A" to top center terminal and then disconnect. Test light should come on in a few seconds. Replace amplifier if it fails any test.

Pathfinder & Pickup

Connect jumper wires to amplifier. (Scheme 4) Test light should come on when wire is connected to pin No. 3. Disconnect jumper wire from pin No. 2. Test light should go off, then come back on after 6 seconds. If not, replace amplifier.

Scheme 2

Scheme 3

Scheme 4

Pulsar NX, Sentra & Stanza

Connect jumper wires to amplifier. (Scheme 2) When wire "A" is connected, test light should come on. Disconnect wire "B". Test light should go off, then come back on after a few seconds. If not, replace amplifier.

TIME CONTROL UNIT

Note. Time Control Unit operates many systems in vehicle. The following tests only check the circuits that control wiper delay operation.

Description

The Time Control Unit is used on Maxima, 200SX and 300ZX models. (Scheme 5) All tests are made using a voltmeter. Insert voltmeter probes into REAR of connectors while they are still plugged into control unit. Ensure ignition key is in correct position while testing each circuit. Perform tests in order listed.

POWER CIRCUIT

1. Remove driver's side dash cover. Remove time control unit with harness connected. Connect a voltmeter between terminals No. 1 (+) and 2 (-). Voltmeter should show 12 volts with ignition switch in any position.
2. Connect voltmeter to terminals No. 20 (+) and 2 (-). With ignition switch in "OFF" or "ACC" positions voltmeter should show zero volts. In "ON" position voltmeter should show 12 volts.
3. Connect voltmeter leads to terminal No. 26 (+) and 2 (-). In "ACC" and "ON" positions voltmeter should read 12 volts. Connect an ohmmeter between terminal No. 2 and body ground. Ohmmeter should show continuity.

INTERMITTENT CIRCUIT

1. If power supply circuit is okay, turn wiper switch to "INT" position. Turn ignition switch to "ACC". Connect voltmeter to terminals No. 2 and 15. Voltmeter needle should deflect every 3-12 seconds.
2. Turn ignition switch to "OFF" position and leave wiper switch in "INT" position. Check continuity between terminals No. 2 and No. 12. Ohmmeter should show zero ohms.

INTERMITTENT CIRCUIT TIME CANNOT BE ADJUSTED

1. Check intermittent wiper volume circuit. Turn ignition switch to "OFF" position. Measure resistance between terminals No. 2 (-) and 16 (+), while turning intermittent wiper volume knob. Ohmmeter should read zero ohms at position "S" and one ohm at position "L".
2. If intermittent wiper volume control circuit is okay, check intermittent wiper volume. If volume is okay, check harness between time control unit and intermittent wiper volume. If intermittent wiper volume is not okay, replace the wiper switch.

WASHER & WIPER WILL NOT OPERATE TOGETHER

Check washer switch circuit. Turn the ignition switch to "OFF" position. Turn washer switch to "ON" position. Check continuity between terminals No. 2 (-) and 14 (+). Ohmmeter should read zero ohms.

Scheme 5

FRONT WIPER MOTOR & LINKAGE

1. Disconnect battery ground cable and motor wiring. Remove motor mounting bolts. Remove nut and clip holding linkage arm to motor shaft. Remove motor.
2. Remove wiper arm cap and nut. Remove wiper arm and wiper shaft nut. Remove inspection cover (if equipped) and remove linkage. To install, reverse removal procedure. Install arms so parked position is .8" (20 mm) from bottom of windshield.

Removal

Remove wiper shaft nut and wiper arm. Open hatch or tailgate and remove inner panel. Disconnect wiring from motor. Remove motor mounting bolts. Remove wiper motor.

Installation

To install, reverse removal procedure. Install wiper arm so blade is .6-.8" (15-20 mm) from edge of glass when wiper is parked.

COMBINATION SWITCH

Reove steering wheel pad and steering wheel. Disconnect all wiring. Remove retaining screw and pull switch off column. To install, reverse removal procedure. Align tab on switch with hole in column.

WIRING DIAGRAMS

Note. For wiring diagrams, see chassis wiring in WIRING DIAGRAMS section.