I was driving down a hill, I was turning on and off my dimmer switch when all of a sudden my head lights went completely out. I almost crashed into a river. When I stopped, I found that I could still have lights if I pulled the signal light switch towards me. I was able to get home safely. It is an 04 P71 Crown Vic. What do you think the problem could be?
An expert who has achieved level 2 by getting 100 points
An expert that got 5 achievements.
An expert whose answer got voted for 20 times.
An expert who has written 20 answers of more than 400 characters.
I HAD THE SAME PROBLEM ON THE SAME YEARS AND MODELS P71 ON SEVERAL CARS AND ALL OF THEM IT WAS THE LCM (LIGHTING CONTROL MODULE) UNDER THE DASH ABOVE THE GAS PEDAL IT HAS TWO PLUGS & TWO SCREWS ,THIS WILL BE YOUR PROBLEM NOT THE DIMMER SWITCH
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
The high and low beam lights use the same power source, so if the low beams work the high beams have power. There is a low and high beam relay controlled by the dimmer switch. If the low beams work and the high beams don't, and the bulbs are good, check the dimmer switch and the high beam relay.
the following is what you can do to test to see whats going on turn on the headlights,put in high position
2.leave light in high, disconnect the head light dimmer switch, connect a fused jumper between head light relay supply voltage circuit of the dimmer switch and the control circuit of the head light relay. if the high beams come on then replace the dimmer switch, if the high beams don,t come on then.
3.use a fused jumper across the battery positive voltage supply circuit and the switched high beam voltage supply circuit. if the high beam come on now replace the head light relay, if the high beams don't come on then you will have to replace the LH I/P fuse block. I would most likely say that it's the relay just because of the year. I gave you a lot here I hope this helps
Ckeck the headlight connections they are notorious for corroding. Check the ground connection for the lights. Pull your dimmer switch back as if you were flashing a car to pass and see if they work there. If they do you have a dimmer switch problem.