Pinpoint Test L: One Turn Signal/Hazard Lamp Is Inoperative/Always on
Turn Signal, Cornering and Hazard Lamps
Pinpoint Tests
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 through circuit 3 (LG/WH) or circuit 2 (WH/LB) to the LH or RH front turn signal. Ground for the turn lamps is provided through circuit 57 (BK).
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.
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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 Testing and Inspection to continue diagnosis of the stoplamps.
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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.
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L3 CHECK CIRCUIT 3 (LG/WH) OR CIRCUIT 2 (WH/LB) 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. TEST the system for normal operation.
No
REPAIR the circuit in question for an open. TEST the system for normal operation.
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L4 CHECK CIRCUIT 3 (LG/WH) OR CIRCUIT 2 (WH/LB) FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: Multifunction Switch C202c.
- Ignition ON.
- Does the turn lamp continue to illuminate?
Yes
REPAIR the circuit in question for a short to voltage. TEST the system for normal operation.
No
INSTALL a new multifunction switch. TEST the system for normal operation.
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