All my lights in the back of the car go on as well as the interior and gauges but headlights are not getting power. Tested plug that goes to headlight and got nothing. Any help is appreciated
88 se

 

They go up and down and everything works. What does the the wires that go to the headlight get their power from relay? which one

 

hummm im having similar probs

not sure about yours as its a S4 - but there are some relays on the front bar near the washer bottle - these are the light relays ( well they are on mine )

at least yours come up - i get nothing

check the main fuse - i think its called main or head - 30a - this does the lighting side

Stu

 

The switch could be faulty. If you can figure out which wire goes from the switch to the headlights and give it power, you'll know if it is the switch. These switches tend to wear out.

 

Its a pretty new switch Had one with other problems and replaced it

 

How can I check the relays?

 

Give them power and ground, off the car. If you hear an audible -click- that means the relay should be good. Well, at least the contacts are closing

 

Replaced them with known working ones and still have no headlights

 

If you still have your old switch give it a try. If this is your problem, you may need to make one good switch from the two. If your replacement switch is not a used part it is probably still ok.