Pinpoint Test Z: The Individual Trailer Lamp Is Inoperative - RH Trailer Turn Signal/STOPLAMP/Hazard Flasher Lamp
WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
- Z1 CHECK TURN SIGNAL OPERATION
- Key in OFF position.
- Disconnect: Trailer Tow C4098 (4-pin).
- Disconnect: Trailer Tow C4099 (7-pin).
- Disconnect the trailer from the vehicle.
- Check the operation of the vehicle exterior lighting systems for any concerns.
- Does the exterior lighting system of the vehicle operate correctly?
- Yes : GO to Z2.
- No : REPAIR any vehicle exterior lighting concerns. TEST the system for normal operation.
- Z2 CHECK CIRCUIT 64 (DG) FOR POWER
- Key in ON position.
- Place the multifunction switch in the RH turn position.
- Measure the voltage between trailer tow C4098-4, circuit 64 (DG) (4-pin connector), or the trailer tow C4099-4, circuit 64 (DG) (7-pin connector), harness side and ground.
- Does the voltage alternate between less than 1 volt and greater than 10 volts?
- Yes : The vehicle is operating correctly. SEND the trailer to an authorized camper/trailer repair center.
- No : GO to Z3.
- Z3 CHECK THE TRAILER RH TURN RELAY
- Key in OFF position.
- Disconnect: Trailer RH Turn Relay.
- Carry out the trailer RH turn relay component test. Refer to COMPONENT TESTING .
- Is the trailer RH turn relay OK?
- Yes
: If equipped with 6.0L diesel, GO to Z7.
All others, GO to Z4.
- No : INSTALL a new trailer RH turn relay. TEST the system for normal operation.
- Z4 CHECK THE INPUT FROM THE MULTIFUNCTION SWITCH
- Key in ON position.
- Measure the voltage between trailer RH turn relay pin 1, circuit 5 (OG/LB), harness side and ground.
- Does the voltage alternate between less than 1 volt and greater than 10 volts?
- Yes : GO to Z5.
- No : REPAIR circuit 5 (OG/LB). TEST the system for normal operation.
- Z5 CHECK VOLTAGE TO THE TRAILER RH TURN RELAY
- Key in OFF position.
- Measure the voltage between trailer RH turn relay pin 3, circuit 1362 (DG/OG), harness side and ground.
- Is the voltage greater than 10 volts?
- Yes : GO to Z6.
- No : REPAIR circuit 1362 (DG/OG). TEST the system for normal operation.
- Z6 CHECK THE TRAILER RH TURN RELAY GROUND
- Measure the resistance between trailer RH turn relay pin 2, circuit 57 (BK), harness side and ground.
- Is the resistance less then 5 ohms?
- Yes : REPAIR circuit 64 (DG). TEST the system for normal operation.
- No : REPAIR circuit 57 (BK). TEST the system for normal operation.
- Z7 CHECK CIRCUIT 5 (OG/LB) FOR AN OPEN
- Key in ON position.
- Measure the voltage between trailer RH turn relay pin 86, circuit 5 (OG/LB), harness side and ground.
- Does the voltage alternate between less than 1 volt and greater than 10 volts?
- Yes : GO to Z8.
- No : REPAIR the circuit. TEST the system for normal operation.
- Z8 CHECK CIRCUIT 1362 (DG/OG) FOR AN OPEN
- Key in OFF position.
- Measure the voltage between trailer RH turn relay pin 30, circuit 1362 (DG/OG), harness side and ground.
- Is the voltage greater than 10 volts?
- Yes : GO to Z9.
- No : REPAIR the circuit. TEST the system for normal operation.
- Z9 CHECK THE TRAILER RH TURN RELAY GROUND
- Measure the resistance between trailer RH turn relay pin 85, circuit 57 (BK), harness side and ground.
- Is the resistance less than 5 ohms?
- Yes : REPAIR circuit 64 (DG). TEST the system for normal operation.
- No : REPAIR circuit 57 (BK). TEST the system for normal operation.