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.
Numbers molded on the component do not necessarily reflect harness side connector.
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 | B1 and H | Off | Open circuit |
| Park | Open circuit | ||
| Head | Closed circuit | ||
| Park lamps | B2 and R | Off | Open circuit |
| Park | Closed circuit | ||
| Head | Closed circuit | ||
| Interior lamp | D1 and D2 | Knob rotated fully counterclockwise (in detent) | Closed circuit |
| Knob rotated fully clockwise (out of detent) | Open circuit | ||
| Illumination dimmer | R and I | Rotate knob clockwise | Ohmmeter will show smoothly increasing resistance |
HEADLAMP SWITCH - COMPONENT TESTING
Scheme 4
Scheme 5
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move key to these positions | A good switch will indicate |
|---|---|---|---|
| Battery Power Circuit | BATT and BATT A2 and A2 | Off/Lock | Closed circuit |
| Run | Closed circuit | ||
| Start | Closed circuit | ||
| Accessory | Closed circuit | ||
| Start power circuit | BATT and ST, BATT and 2 | Off/Lock | Open circuit |
| Run | Open circuit | ||
| Run power circuit | BATT and A2, BATT and 1 | Off/Lock | Open circuit |
| Run | Closed circuit | ||
| Start | Open circuit | ||
| Accessory | Open circuit | ||
| Run/Acc power circuit | BATT and A1 | Off/Lock | Open circuit |
| Run | Closed circuit | ||
| Start | Open circuit | ||
| Accessory | Closed circuit |
IGNITION SWITCH (11572) - COMPONENT TESTING
Scheme 6
Scheme 7
Connect a self-powered test light or ohmmeter to terminal 2 and the appropriate terminal in the following table
| Function | Terminal | ||||
|---|---|---|---|---|---|
| 5 | 6 | 1 | 4 | 3 | |
| Off | Open | Open | Open | Open | Open |
| Int-1 | Open | Open | Open | Open | Closed |
| Int-2 | Open | Open | Open | Closed | Closed |
| Int-3 | Open | Open | Open | Closed | Open |
| Int-4 | Open | Open | Closed | Closed | Open |
| Int-5 | Open | Open | Closed | Open | Open |
| Low | Open | Open | Closed | Open | Closed |
| High | Open | Closed | Closed | Open | Closed |
| Wash-w/CKT 680 | Closed | Open | Any | Any | Any |
| Wash-w/o CKT 680 | Open | Open | Closed | Closed | Closed |
| Mist | Open | Closed | Open | Open | Open |
MULTIFUNCTION SWITCH - COMPONENT TESTING (WIPER/WASHER)
Scheme 8
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Turn signal | C202a cavity 44, C202b cavity 9 and C202a cavity 2 | Hazard switch to Normal (Off) and Turn switch to Left | Closed circuit |
| C202a cavity 44, 5 and 2 | Hazard switch to Normal (Off) and Turn switch to Right | Closed circuit | |
| Hazard | C202a cavity 44, 2, 3, 5 and C202b cavity 9 | Hazard switch to Hazard (On) (Button pushed in and then released to fully extended position) | Closed circuit |
| C202a cavity 511, 5 and C202b cavity 9 | Hazard switch to hazard (On) and Turn switch to Neutral | Closed circuit | |
| Flash-to-pass | C202b cavity 9 and 13, and C202b cavity 11 and 10 | Pull and hold lever stalk toward steering wheel | Closed circuit |
| High beam | C202b 9 and 10 | Lever stalk in detent away from steering wheel | Closed circuit |
| Low beam | C2026 9 and 12 | Lever stalk in neutral position toward steering wheel | Closed circuit |
| Brake lights | C202a cavity 4 and C202a cavity 5 C202a cavity 4 and C202b cavity 2. | Turn switch to Neutral position, Hazard switch to Normal (Off) | Closed circuit |
MULTIFUNCTION SWITCH - COMPONENT TESTING (EXTERIOR LIGHTS)
Scheme 9
Scheme 10
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Power and Ground Checks Before Any Other Tests | 10 and 7 10 and 12 11 and 9 11 and 14 | All window switches - at test | Open circuit |
| 9 and 15 14 and 8 7 and 13 12 and 6 | All window switches at test | Closed circuit | |
| Left front window circuit | 10 and 6 | Up | Closed circuit |
| 10 and 13 | Down | Closed circuit | |
| Right front window circuit | 11 and 8 | Up | Closed circuit |
| 11 and 15 | Down | Closed circuit |
MASTER WINDOW/DOOR LOCK/UNLOCK SWITCH - COMPONENT TESTING
Scheme 11
Scheme 12
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Lock Switch Circuit | 3 and 2 | Lock | Closed circuit |
| 1 and 4 | Lock | Closed circuit | |
| Rest | Closed circuit | ||
| Unlock Switch Circuit | 3 and 4 | Unlock | Closed circuit |
| 5 and 2 | Rest | Closed circuit |
MASTER WINDOW/DOOR LOCK/UNLOCK SWITCH - COMPONENT TESTING
Scheme 13
Scheme 14
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Up Switch Circuit | 3 and 5 | Up | Closed circuit |
| 4 and 1 | Up | Closed circuit | |
| Rest | Closed circuit | ||
| Down Switch Circuit | 3 and 1 | Down | Closed circuit |
| 2 and 5 | Down | Closed circuit | |
| Rest | Closed circuit |
MASTER WINDOW/DOOR LOCK/UNLOCK SWITCH - COMPONENT TESTING
Scheme 15
Scheme 16
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Lock Switch Circuit | 8 and 9 | Lock | Closed circuit |
| 7 and 10 | Lock | Closed circuit | |
| Rest | Closed circuit | ||
| Unlock Switch Circuit | 8 and 7 | Unlock | Closed circuit |
| 6 and 9 | Unlock | Closed circuit | |
| Rest | Closed circuit |
MASTER WINDOW/DOOR LOCK/UNLOCK SWITCH - COMPONENT TESTING
Scheme 17
Scheme 18
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will indicate |
|---|---|---|---|
| Lock Switch Circuit | 3 and 5 | Lock | Closed circuit |
| 1 and 2 | Lock | Closed circuit | |
| Rest | Closed circuit | ||
| Unlock Switch Circuit | 3 and 1 | Unlock | Closed circuit |
| 5 and 4 | Unlock | Closed circuit | |
| Rest | Closed circuit |
DOOR LOCK SWITCH, REAR DOORS - COMPONENT TESTING
Scheme 19
Scheme 20
| Circuit to test | Connect self-powered test light or ohmmeter to terminals | Move switch to these positions | A good switch will Indicate |
|---|---|---|---|
| Power and Ground Checks Before Any Other Tests | 3 and 1 | Rest | Open circuit |
| 1 and all others except 3 | Rest | Closed circuit | |
| Front up/down circuit | 3 and 3 | Up | Closed circuit |
| 3 and 6 | Down | Closed circuit | |
| Rear up down circuit | 3 and 7 | Up | Closed circuit |
| 3 and 4 | Down | Closed circuit | |
| Entire seat circuit | 3 and 2 | Rearward | Closed circuit |
| 3 and 5 | Forward | Closed circuit | |
| 3 and 6 | Down | Closed circuit | |
| 3 and 4 | Down | Closed circuit | |
| 3 and 3 | Up | Closed circuit | |
| 3 and 7 | Up | Closed circuit |
SEAT ADJUST SWITCH, DRIVER SIDE FRONT (14A701) - COMPONENT TESTING
Scheme 21
Scheme 22
| 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 | 1 and 7 5 and 6 | Up | Closed circuit |
| Down | 1 and 6 5 and 7 | Down | Closed circuit |
| Left | 1 and 4 4 and 5 | Left | Closed circuit |
| Right | 1 and 6 4 and 5 | Right | Closed circuit |
| Right mirror | Selector switch Right | ||
| Up | 1 and 8 5 and 6 | Up | Closed circuit |
| Down | 1 and 6 5 and 8 | Down | Closed circuit |
| Left | 1 and 3 5 and 6 | Left | Closed circuit |
| Right | 1 and 6 3 and 5 | Right | Closed circuit |
EXTERIOR REAR VIEW MIRROR SWITCH (17B676) - COMPONENT TESTING
Scheme 23
Scheme 24
| Circuit to test | Connect ohmmeter to terminals | A good relay will indicate |
|---|---|---|
| Coil | 1 and 2 | 50-100ohm |
| 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.
Scheme 25
Scheme 26
| Circuit to test | Connect ohmmeter to terminals | A good relay will indicate |
|---|---|---|
| Coil | 85 and 86 | 50-100ohm |
| Contact | 30 and 87a | Closed circuit |
| 30 and 87 | Open circuit | |
| Coil - Contact | 86 and 30 | Open circuit |
| 86 and 30 | 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.