Operation CHARM: Car repair manuals for everyone.

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




Turn Signal, Cornering and Hazard Lamps

Pinpoint Test L: One Turn Signal/Hazard 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 to the LH or RH front turn signal lamp.

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.

-------------------------------------------------
L1 CHECK THE STOPLAMPS


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

Yes
If a front turn lamp is inoperative, GO to L2.

If a front turn lamp is always on, GO to L4.

No
REFER to Stoplamps Special Tool(s) Used With Diagnostics to continue diagnosis of the stoplamps.

-------------------------------------------------
L2 CHECK FOR VOLTAGE TO THE INOPERATIVE TURN LAMP


- Disconnect: Inoperative Turn Lamp .
- Activate the hazard lamp function.
- Measure the voltage between the inoperative lamp, harness side and ground as follows:









- Does the voltage alternate between 0 and greater than 10 volts?

Yes
REPAIR circuit 57 (BK) for an open. TEST the system for normal operation.

No
GO to L3.

-------------------------------------------------
L3 CHECK THE TURN LAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN


- Connect: Inoperative Turn Lamp .
- Disconnect: Multifunction Switch C202c .
- Connect a fused jumper wire between the multifunction switch C202c-6, circuit 383 (RD/WH), harness side and the multifunction switch C202c-2 (LH front turn lamp), circuit 3 (LG/WH), harness side; or between the multifunction switch C202c-6, circuit 383 (RD/WH), harness side and the multifunction switch C202c-3 (RH front turn lamp), circuit 2 (WH/LB), harness side.




- Does the turn lamp illuminate?

Yes
INSTALL a new multifunction switch. REFER to Steering Column Switches Steering Column Multifunction Switch. TEST the system for normal operation.

No
REPAIR circuit 3 (LG/WH) or circuit 2 (WH/LB) for an open. TEST the system for normal operation.

-------------------------------------------------
L4 CHECK THE TURN LAMP VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE


- Ignition OFF.
- Disconnect: Multifunction Switch C202c .
- Ignition ON.
- Does the turn lamp continue to illuminate?

Yes
REPAIR circuit 3 (LG/WH) or circuit 2 (WH/LB) for a short to voltage. TEST the system for normal operation.

No
INSTALL a new multifunction switch. REFER to Steering Column Switches Steering Column Multifunction Switch. TEST the system for normal operation.

-------------------------------------------------