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View Full Version : Headlight Troubleshooting - HELP



Haze
08-03-2016, 09:29 PM
2013 STS. I've been rebuilding the front end after an accident.
Replaced the frunk and front body panels.
Changed my headlight bulbs and have no light.
Reinstalled the original bulbs and no light. Now in retrospect I can't be certain the lights were woking after that accident.
Both lights are out so I am looking for a common cause such as a relay, fuse or switch.
Is there a trouble shooting sequence for headlight failure? My shop manual is vague in diagnostics.
Does the engine have to be running for the lights to power up?
Is there a minimum voltage to trigger the headlight circuit?
All help is appreciated.:thumbup:

Chupaca
08-03-2016, 09:41 PM
Hook it all up and hit the flash button on the back of the throttle control . This is direct power to the headlights ...:thumbup:

SpyderAnn01
08-03-2016, 09:56 PM
Yes, it does have to be running for the headlights to be on