Pinpoint Test H: All The Stoplamps Are Inoperative

Stoplamps

Pinpoint Test H: All The Stoplamps Are Inoperative

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

Normal Operation

The stoplamp switch is provided voltage at all times from the Central Junction Box (CJB) fuse 18 (10A). The stoplamps are combination rear stop/turn lamps.

On 4-door vehicles, when the brake pedal is applied, voltage is routed to the high mounted stoplamp and to the LH and RH turn relays. The voltage passes through the turn relays, to the LH and RH stoplamps.

On 5-door vehicles, when the brake pedal is applied, voltage is routed to all of the stoplamps.

This pinpoint test is intended to diagnose the following:

- Fuse

- Wiring, terminals or connectors

- Stoplamp switch

PINPOINT TEST H : ALL THE STOPLAMPS ARE INOPERATIVE

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

H1 CHECK FOR VOLTAGE TO THE STOPLAMP SWITCH

- Ignition OFF.

- Disconnect: Stoplamp Switch C2314.

- Measure the voltage between the stoplamp switch C2314-1, circuit SBP18 (YE/RD), harness side and ground.





Is the voltage greater than 10 volts?

Yes
GO to H2.

No
VERIFY the CJB (Central Junction Box) fuse 18 (10A) is OK. If OK, GO to H2. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short Electrical Diagrams.

H2 BYPASS THE STOPLAMP SWITCH

- Connect a fused jumper wire between the stoplamp switch C2314-1, circuit SBP18 (YE/RD), harness side and the stoplamp switch C2314-2, circuit CCA26 (BU/GY), harness side.





Are the stoplamps illuminated?

Yes
REMOVE the jumper wire. INSTALL a new stoplamp switch. REFER to Stoplamp Switch Service and Repair. TEST the system for normal operation.

No
REMOVE the jumper wire. REPAIR circuit CCA26 (BU/GY) for an open. TEST the system for normal operation.