Driving light wiring help....

[JimiGibbs]

Just wired up my Hella 450driving lights.... When I flip the switch I hear the relay click but no lights. Am I correct to assume I have a bad connection between the relay and the lights? Pretty sure everything else it wired correctly.... THANKS

[Eagle_SX4]

If they are wired up using the factory wiring, the headlights need to be on.

[JimiGibbs]

Yea.... Still doesn't work with the headlights on. About to go start doing some troubleshooting.

[Gojira94]

Relay has power and ground, so that's good at C175 relay pins 85 & 86, and C102 pins 2 and 5 (10-way connector behind left headlight).

 

(Convenient time to check/ clean C102 pins for good measure)

C102 pin 6 should read hot at all times.

Relay C175/ pin 87 should send 12V to C370 & C371 pin B with the headlights and fog light switch on.

 

A single splice feeds power from relay pin 87 to both fog lamps on their pin B. Check incoming power on pin B

 

A single splice provides ground for both fog lamps on their pin A. Check continuity from C370 & C371 pin A to body ground G103 in the inner LH fender panel.

 

[JimiGibbs]

Well.... after I checked the switch , checked the relay and checking continuity of all wires..... It was a bad ground on the lights themselves. 

[garyweb3]

I had the same problem on my fog lights.