Introduction
Component testing procedures are provided to determine whether a component is good or bad.
Testing information for each component includes a schematic, a view of the terminal locations and step by step test procedures.
Terminal locations are identified by numbers or letters that may be on the component or next to it.
Scheme 1
The component connector MUST BE REMOVED before testing. To test a single circuit within the component, select that circuit under the column Circuit to test. If you wish to test the complete component, perform all tests.
Connect the tester to the terminals shown in the second column and operate the component as shown in the third column.
Scheme 2
Scheme 3
| Circuit to test | Connect self powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Headlamp | 1 and 6 | Off | Open circuit |
| Head | Closed circuit | ||
| Park | Open circuit | ||
| Park lamps | 5 and 10 | Off | Open circuit |
| Head | Closed circuit | ||
| Fog lamps | Closed circuit | ||
| Fog lamps | 9 and 10 | Off | Open circuit |
| Park | Closed circuit | ||
| Head | Closed circuit |
MAIN LIGHT SWITCH, EXTERIOR LAMPS - COMPONENT TESTING
Scheme 4
Scheme 5
| Circuit to test | Connect self powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Dome | 2 and 4 | On | Closed circuit |
| Off | Open circuit |
ILLUMINATION DIMMER - COMPONENT TESTING
Scheme 6
| Circuit to test | Connect self powered test light or ohmmeter to terminals | Move key to these positions | A good switch will indicate |
|---|---|---|---|
| Run power circuit | 3 and 7 8 and 9 12 and 13 | Off/Lock | Open circuit |
| Accessory | Open circuit | ||
| Run | Closed circuit | ||
| Start | Open circuit | ||
| Run/Start power circuit | 1 and 2 | Off/Lock | Open circuit |
| Accessory | Open circuit | ||
| Run | Closed circuit | ||
| Start | Closed circuit | ||
| Acc power circuit | 2 and 3 | Off/Lock | Open circuit |
| Accessory | Closed circuit | ||
| Run | Open circuit | ||
| Start | Open circuit | ||
| Start power circuit | 5 and 9 | Off/Lock | Open circuit |
| Accessory | Open circuit | ||
| Run | Open circuit | ||
| Start | Closed circuit |
IGNITION SWITCH (11572) - COMPONENT TESTING
Scheme 7
Scheme 8
| Circuit to test | Connect self powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Front washer switch circuit | 5 and 6 | Front washer | Closed circuit |
| Off | Open circuit | ||
| Front wiper switch circuit | 1 and 6 | Off | Open circuit |
| Low | Closed circuit | ||
| High | |||
| 4 and 6 | Off | Open circuit | |
| Low | |||
| High | Closed circuit | ||
| 2 and 6 | Off | Open circuit | |
| Low | Closed circuit | ||
| High |
MULTIFUNCTION SWITCH, WIPER/WASHER PORTION - COMPONENT TESTING
Scheme 9
| Circuit to test | Connect self powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Intermittent wiper circuit, front | 1 and 6 | Interval 1 | Closed circuit |
| Interval 2 | |||
| Interval 3 | Open circuit | ||
| Interval 4 | |||
| Interval 5 | |||
| 3 and 6 | Interval 1 | Open circuit | |
| Interval 2 | Closed circuit | ||
| Interval 3 | |||
| Interval 4 | |||
| Interval 5 | Open circuit | ||
| 2 and 6 | Interval 1 | Open circuit | |
| Interval 2 | |||
| Interval 3 | |||
| Interval 4 | Closed circuit | ||
| Interval 5 |
MULTIFUNCTION SWITCH, WIPER/WASHER PORTION - COMPONENT TESTING
Scheme 10
Scheme 11
| Circuit to test | Connect self powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| High beams | 8 and 7 | High beam | Closed circuit |
| Flash to pass | Open circuit | ||
| Low beam | Open circuit | ||
| Low beam/Flash to pass | 8 and 9 | High beam | Open circuit |
| Flash to pass | Closed circuit | ||
| Low beam | Closed circuit | ||
| 6 and 7 | High beam | Open circuit | |
| Flash to pass | Closed circuit | ||
| Low beam | Open circuit |
MULTIFUNCTION SWITCH, LAMP PORTION - COMPONENT TESTING
Scheme 12
Scheme 13
| Circuit to test | Connect self powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Turn signal | C202b-2 and C202a-10 | Left turn | Closed circuit |
| C202b-2 and C202a-9 | Left turn | Closed circuit | |
| C202b-2 and C202a-7 | Right turn | Closed circuit | |
| C202b-2 and C202a-8 | Right turn | Closed circuit | |
| Hazard | C202b-3 and C202a-10 C202b-3 and C202a-7 | Turn signal switch in netural Hazard On | Closed circuit |
| C202b-3 and C202a-9 | |||
| C202b-3 and C202a-8 | |||
| C202b-1 and C202a-10 | Turn signal switch in netural Hazard Off | Closed circuit | |
| C202b-1 and C202a-8 |
MULTIFUNCTION SWITCH, TURN PORTION - COMPONENT TESTING
Scheme 14
Scheme 15
| Circuit to test | Connect self powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Left front window circuit | 5 and 4, 2 and 1 | Up | Closed circuit |
| 5 and 1, 2 and 4 | Down | Closed circuit | |
| 2 and 4, 2 and 1 | Rest | Closed circuit | |
| Right front window circuit | 5 and 3, 2 and 6 | Up | Closed circuit |
| 5 and 6, 2 and 3 | Down | Closed circuit | |
| 2 and 6, 2 and 3 | Rest | Closed circuit |
MASTER WINDOW ADJUST SWITCH - COMPONENT TESTING
Scheme 16
Scheme 17
| Circuit to test | Connect self powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Window adjust switches | 3 and 1 4 and 5 | Up | Closed circuit |
| 3 and 5 1 and 2 | Down | Closed circuit | |
| 4 and 5 2 and 1 | Off | Closed circuit |
POWER WINDOW SWITCH, PASSENGER DOOR - COMPONENT TESTING
Scheme 18
Scheme 19
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate | |
|---|---|---|---|---|
| Left mirror | Up | 4 and 6 7 and 8 | Selector switch left Adjuster switch up | Closed circuit |
| Down | 4 and 7 6 and 8 | Selector switch left Adjuster switch down | Closed circuit | |
| Left | 4 and 1 7 and 8 | Selector switch left Adjuster switch left | Closed circuit | |
| Right | 4 and 7 1 and 8 | Selector switch left Adjuster switch right | Closed circuit | |
| Right mirror | Up | 4 and 5 7 and 8 | Selector switch right Adjuster switch up | Closed circuit |
| Down | 4 and 7 5 and 8 | Selector switch right Adjuster switch down | Closed circuit | |
| Left | 4 and 2 7 and 8 | Selector switch right Adjuster switch left | Closed circuit | |
| Right | 4 and 7 2 and 8 | Selector switch right Adjuster switch right | Closed circuit | |
EXTERIOR REAR VIEW MIRROR SWITCH (17B676) - COMPONENT TESTING
Scheme 20
Scheme 21
| Circuit to test | Connect self powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Door lock switch | 1 and 3 | Lock | Closed circuit |
| Unlock | Open circuit | ||
| Neutral | Open circuit | ||
| 5 and 3 | Lock | Open circuit | |
| Unlock | Closed circuit | ||
| Neutral | Open circuit |
DOOR LOCK SWITCH, DRIVER SIDE - COMPONENT TESTING
Scheme 22
Scheme 23
| Circuit to test | Connect self powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Door lock switch | 1 and 3 | Lock | Closed circuit |
| Unlock | Open circuit | ||
| Neutral | Open circuit | ||
| 5 and 3 | Lock | Open circuit | |
| Unlock | Closed circuit | ||
| Neutral | Open circuit |
DOOR LOCK SWITCH, PASSENGER SIDE - COMPONENT TESTING
Scheme 24
Scheme 25
| Circuit to test | Connect ohmmeter to terminals | A good relay will indicate |
|---|---|---|
| Coil | 85 and 86 | 46 90 |
| Contact | 30 and 87a | Closed circuit |
| 30 and 87 | Open circuit | |
| Coil Contact | 86 and 30 | Open circuit |
| 86 and 87a | Open circuit | |
| 86 and 87 | Open circuit |
RELAY MINI ISO - COMPONENT TESTING (NO VOLTAGE APPLIED)
Disconnect the ohmmeter: connect pins 30 and 85 to 12V DC power and pin 86 to ground. Measure voltage between pin 87 and pin 86.
If the voltage is 12V, continue with the test. If not, replace the relay. Disconnect power from pin 85 and measure voltage between pin 87a and pin 86. If the voltage is 12V, the relay is okay. If not, replace the relay.
Scheme 26
Scheme 27
| Circuit to test | Connect ohmmeter to terminals | A good relay will indicate |
|---|---|---|
| Coil | 1 and 2 | 63 102 |
| Contact | 3 and 4 | Closed circuit |
| 3 and 5 | Open circuit | |
| Coil Contact | 1 and 3 | Open circuit |
| 1 and 4 | Open circuit | |
| 1 and 5 | Open circuit |
RELAY MICRO ISO - COMPONENT TESTING (NO VOLTAGE APPLIED)
Disconnect the ohmmeter; connect pins 2 and 3 to 12V DC power and pin 1 to ground. Measure voltage between pin 5 and pin 1. If the voltage is 12V, continue with the test. If not replace the relay. Disconnect power from pin 2 and measure voltage between pin 4 and pin 1. If the voltage is 12V, the relay is okay. If not, replace the relay.