Pinpoint Test L: One Turn Signal Lamp Is Inoperative/Always On
Turn Signal, Cornering and Hazard Lamps
Pinpoint Tests
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 to the LH or RH front turn signal.
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.
-------------------------------------------------
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.
-------------------------------------------------
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.
-------------------------------------------------
L3 CHECK FOR VOLTAGE TO THE INOPERATIVE TURN LAMP
- Ignition OFF.
- Disconnect: Inoperative Turn Lamp .
- Measure the voltage between the inoperative lamp, harness side and ground as follows:
- Is 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 L4.
-------------------------------------------------
L4 CHECK THE TURN LAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
- 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. REFER to Steering Column Switches Steering Column Multifunction Switch. TEST the system for normal operation.
No
REMOVE the jumper wire. REPAIR circuit 3 (LG/WH) (LH front turn lamp) or circuit 2 (WH/LB) (RH front turn lamp) for an open. TEST the system for normal operation.
-------------------------------------------------
L5 CHECK THE TURN LAMP VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: Multifunction Switch C202a .
- Ignition ON.
- Does the turn lamp continue to illuminate?
Yes
REPAIR circuit 3 (LG/WH) (LH front turn lamp) or circuit 2 (WH/LB) (RH front turn lamp) 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.
-------------------------------------------------