Pinpoint Test W: The Individual Trailer Stop/Turn Lamp Is Inoperative

Trailer Lamps

Pinpoint Tests

Pinpoint Test W: The Individual Trailer Stop/Turn Lamp Is Inoperative

Refer to Wiring Diagram Set 95, Trailer/Camper Adapter for schematic and connector information. Diagrams By Number

Normal Operation

When the brake pedal is applied, voltage is provided to the trailer tow connector for the LH and RH trailer stop/turn lamps.

This pinpoint test is intended to diagnose the following:

- Fuse
- Wiring, terminals or connectors
- Trailer

PINPOINT TEST W: THE INDIVIDUAL TRAILER STOP/TURN LAMP IS INOPERATIVE

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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W1 CHECK FOR VOLTAGE TO THE TRAILER TOW CONNECTOR

- While applying the brake pedal, measure the voltage between the trailer tow C439-2, circuit CAT06 (YE) (LH stoplamp), harness side and ground; or between the trailer tow C439-1, circuit CAT09 (GN) (RH stoplamp), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
The vehicle is operating correctly. SEND the trailer to an authorized camper/trailer repair facility.

No
VERIFY the SJB fuse 42 (7.5A) (LH stoplamp) or fuse 38 (7.5A) (RH stoplamp) is OK. If OK, REPAIR the circuit in question for an open. TEST the system for normal operation. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short. Diagrams By Number

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