Pinpoint Test L: One Turn Signal Lamp Is Inoperative/Always On

Turn Signal, Cornering and Hazard Lamps

Pinpoint Test L: One Turn Signal Lamp Is Inoperative/Always On

Refer to Wiring Diagram Set 90, Turn Signal/Stop/Hazard Lamps for schematic and connector information. Diagrams By Number

Normal Operation

When the multifunction switch is placed in the LH or RH TURN position, voltage is routed through circuit 3 (LG/WH) to the LH front turn signal or circuit 2 (WH/LB) to the RH front turn signal. Ground for the turn lamps is provided through circuit 57 (BK).

The rear turn lamps utilize the circuitry for the stoplamps.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- Multifunction switch



PINPOINT TEST L: ONE TURN SIGNAL/HAZARD LAMP IS INOPERATIVE/ALWAYS ON

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.

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L1 CHECK THE STOPLAMPS


- Ignition OFF.
- Apply and release the brake pedal.
- Do the stoplamps operate correctly?

Yes
GO to L2.

No
REFER to Stoplamps Testing and Inspection.

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L2 DETERMINE IF A TURN LAMP IS ALWAYS ON OR INOPERATIVE


- Ignition ON.
- Is a front turn lamp always illuminated?

Yes
GO to L5.

No
GO to L3.

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L3 CHECK CIRCUIT 57 (BK) FOR AN OPEN


- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Disconnect: Inoperative Turn Lamp.
- Measure the resistance between the inoperative lamp, harness side and ground as follows:





- Is the resistance less than 5 ohms?

Yes
GO to L4.

No
REPAIR the circuit. TEST the system for normal operation.

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L4 CHECK CIRCUIT 3 (LG/WH) OR CIRCUIT 2 (WH/LB) FOR AN OPEN


- Connect: Negative Battery Cable.
- Connect: Inoperative Turn Lamp.
- Disconnect: Multifunction Switch C202a.
- Connect a fused jumper wire between the multifunction switch C202a-6, circuit 383 (RD/WH), harness side and the multifunction switch C202a-2 (LH front turn lamp), circuit 3 (LG/WH), harness side; or between the multifunction switch C202a-6, circuit 383 (RD/WH), harness side and the multifunction switch C202a-3 (RH front turn lamp), circuit 2 (WH/LB), harness side.




- Does the turn lamp illuminate?

Yes
REMOVE the jumper wire. INSTALL a new multifunction switch. TEST the system for normal operation.

No
REMOVE the jumper wire. REPAIR the circuit in question. TEST the system for normal operation.

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L5 CHECK CIRCUIT 3 (LG/WH) (LH TURN LAMP) OR CIRCUIT 2 (WH/LB) (RH TURN LAMP) FOR A SHORT TO VOLTAGE


- Ignition OFF.
- Disconnect: Multifunction Switch C202a.
- Ignition ON.
- Does the turn lamp continue to illuminate?

Yes
REPAIR the circuit in question. TEST the system for normal operation.

No
INSTALL a new multifunction switch. TEST the system for normal operation.

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