Pinpoint Test J: The Stoplamps Are On Continuously

Stoplamps

Pinpoint Test J: The Stoplamps Are On Continuously

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

Normal Operation

When the brake pedal is applied, the stoplamp switch closes and routes voltage to the high mounted stoplamp and the multifunction switch through circuit 10 (LG/RD). The multifunction switch then routes the voltage through circuit 9 (LG/OG) to the LH rear lamp and circuit 5 (OG/LB) to the RH rear lamp.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- Stoplamp switch
- Multifunction switch



PINPOINT TEST J: THE STOPLAMPS ARE ON CONTINUOUSLY

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

-------------------------------------------------
J1 CHECK THE STOPLAMP SWITCH


- Disconnect: Stoplamp Switch C278.
- Do the stoplamps continue to illuminate?

Yes
GO to J2.

No
INSTALL a new stoplamp switch. REFER to Stoplamp Switch Service and Repair. TEST the system for normal operation.

-------------------------------------------------
J2 CHECK THE MULTIFUNCTION SWITCH


- Disconnect: Multifunction Switch C202c and C202a.
- Do the stoplamps continue to illuminate?

Yes
If the LH rear stoplamp continues to illuminate, REPAIR circuit 9 (LG/OG) or 5 (OG/LB) as necessary. TEST the system for normal operation.

If the RH rear stoplamp continues to illuminate, REPAIR circuit 5 (OG/LB). TEST the system for normal operation.

If the high mounted stoplamp continues to illuminate, REPAIR circuit 10 (LG/RD). TEST the system for normal operation.

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

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