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 terminal | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Start circuit | 4 and 7 | Off | Open circuit |
| Acc | Open circuit | ||
| Run | Open circuit | ||
| Start | Closed circuit | ||
| Run/Start power circuit | 4 and 1 | Off | Open circuit |
| Acc | Open circuit | ||
| Run | Closed circuit | ||
| Start | Closed circuit | ||
| Run/Acc power circuit | 4 and 6 | Off | Open circuit |
| Acc | Closed circuit | ||
| Run | Closed circuit | ||
| Start | Open circuit | ||
| Key reminder circuit | 4 and 5 | Key In | Closed circuit |
| Key Out | Open circuit | ||
| Key removal inhibit circuit | 4 and 3 | 65[]75 Ohms |
IGNITION SWITCH - COMPONENT TESTING
Scheme 4
Scheme 5
| Circuit to test | Connect self-powered test light or ohmmeter to terminal | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Off circuit | 8 and 4 15 and 16 15 and 13 | Off | Closed circuit |
| Park | Open circuit | ||
| Head | Open circuit | ||
| Headlamp circuit | 8 and 6 | Off | Open circuit |
| Park | Open circuit | ||
| Head | Closed circuit | ||
| Park circuit | 11 and 13 11 and 16 | Off | Open circuit |
| Park | Closed circuit | ||
| Head | Closed circuit | ||
| Rear Fog circuit | 7 and 2 | Off | Open circuit |
| Front Fog | Open circuit | ||
| Rear Fog | Closed circuit | ||
| Front Fog circuit | 7 and 3 | Off | Open circuit |
| Front Fog | Closed circuit | ||
| Rear Fog | Closed circuit |
MAIN LIGHT SWITCH - COMPONENT TESTING
Scheme 6
Scheme 7
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Turn signal | 6 and 10 | Left turn | Closed circuit |
| 7 and 10 | Right turn | Closed circuit | |
| Flash-to-pass | 9 and 10 | Pull and hold lever stalk to first detent toward steering wheel | Closed circuit |
| High beam | 8 and 10 9 and 10 | Pull and hold lever stalk to second detent toward steering wheel | Closed circuit |
MULTIFUNCTION SWITCH - COMPONENT TESTING
Scheme 8
Scheme 9
| 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 | 1 and 8 | Wash | Closed circuit |
| Rest | Open circuit | ||
| Rear washer switch circuit | 4 and 8 | Wash | Closed circuit |
| Rest | Open circuit | ||
| Front wiper high circuit | 2 and 3 | High | Closed circuit |
| All positions except high | Open circuit | ||
| Front wiper low circuit | 6 and 3 | Single pass | Closed circuit |
| Low | Closed circuit | ||
| All positions except low or single pass | Open circuit | ||
| Front wiper single pass circuit | 6 and 3 | Single pass | Closed circuit |
| Low | Closed circuit | ||
| All positions except low or single pass | Open circuit | ||
| Front wiper intermittent circuit | 12 and 3 | Intermittent | Closed circuit |
| All positions except intermittent | Open circuit | ||
| Rear wiper circuit | 5 and 3 | Off | Open circuit |
| On | Closed circuit | ||
| Wash | Closed circuit |
WIPER/WASHER SWITCH - 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 |
|---|---|---|---|
| Driver front window circuit | 2, C3293A and 7, C3293A 3, C3293A and 1, C3293A | Up | Closed circuit |
| Down | Open circuit | ||
| 2, C3293A and 1, C3293A 6, C3293A and 7, C3293A | Up | Open circuit | |
| Down | Closed circuit | ||
| 6, C3293A and 7, C3293A 3, C3293A and 1, C3293A | Rest | Closed circuit | |
| Passenger front window circuit | 2, C3293B and 1, C3293B 3, C3293B and 7, C3293B | Up | Closed circuit |
| Down | Open circuit | ||
| 6, C3293B and 1, C3293B 2, C3293B and 7, C3293B | Up | Open circuit | |
| Down | Closed circuit | ||
| 6, C3293B and 1, C3293B 3, C3293B and 7, C3293B | Rest | Closed circuit |
MASTER WINDOW CONTROL SWITCH - 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 |
|---|---|---|---|
| Left mirror | Selector switch left | ||
| Up | 6 and 1 4 and 3 | Up | Closed circuit |
| Down | 6 and 3 4 and 1 | Down | Closed circuit |
| Left | 6 and 3 4 and 7 | Left | Closed circuit |
| Right | 6 and 7 4 and 3 | Right | Closed circuit |
| Right mirror | Selector switch right | ||
| Up | 6 and 2 4 and 3 | Up | Closed circuit |
| Down | 6 and 3 4 and 2 | Down | Closed circuit |
| Left | 6 and 3 4 and 5 | Left | Closed circuit |
| Right | 6 and 5 4 and 3 | Right | Closed circuit |
EXTERIOR REAR VIEW MIRROR SWITCH - COMPONENT TESTING
Scheme 14
Scheme 15
| Circuit to test | Connect ohmmeter to terminals | A good relay will indicate |
|---|---|---|
| Coil | 85 and 86 | 50-100 Ohms |
| Coil - Contact | 30 and 87 | Open circuit |
| 86 and 30 | Open circuit | |
| 86 and 87 | Open circuit |
RELAY, MINI ISO - COMPONENT TESTING
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 voltage is 12V, the relay is okay. If not, replace the relay
Scheme 16
Scheme 17
| Circuit to test | Connect ohmmeter to terminals | A good relay will indicate |
|---|---|---|
| Coil | 1 and 2 | 100-150 Ohms |
| Coil - Contact | 3 and 5 | Open circuit |
| 1 and 3 | Open circuit | |
| 1 and 5 | Open circuit |
RELAYS, MICRO - COMPONENT TESTING
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 voltage is 12V, the relay is okay. If not, replace the relay