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Old 02/11/2006, 08:42 AM   #1
Redwingrobb
 

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Headlights, Instrument Panel Blink on Trip

Okay, here's the situation that I encountered. I picked up the car on Thursday and was driving back to a friends house before we left on Friday. He told me that my headlights were blinking. He thought it might be the foot dimmer/hi-beam switch, so we went down to the local auto place and picked one up. I installed it that night and and everything seemed to work. The next morning (4:00 AM), we left. As I was heading out, my instrument gauge started blinking like a Christmas tree (headlights were fine at the time). About 10 minutes later I got on the interstate and was driving when the headlights started powering off and on (not blinking, but like you were using a dimmer switch). At that point, the instrument cluster lights stayed on. I then figured since I was right behind my car with my friend, that I would just follow closely, turn off the headlights and go only with fogs. I did that for about 10 minutes and then the fogs totally went out. I switched back to the headlights and the headlights started blinking, but the fogs came back on. The fogs did not do the dimming like the headlights. Is there the potential that I have yet another dimmer switch bad, fuses, or just some screwed up wiring? Robb


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Old 02/11/2006, 10:49 AM   #2
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Robb;
Check your headlight switch in the dash. These switch's have a tendency to overheat and melt the connectors over time. I had the same problem and replaced the headlight switch and wala - problem solved. You can also do a search here on the site for a thread that talked about that very problem.

Don

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Old 02/11/2006, 11:47 AM   #3
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Quote:
Originally Posted by Redwingrobb
Okay, here's the situation that I encountered. I picked up the car on Thursday and was driving back to a friends house before we left on Friday. He told me that my headlights were blinking. He thought it might be the foot dimmer/hi-beam switch, so we went down to the local auto place and picked one up. I installed it that night and and everything seemed to work. The next morning (4:00 AM), we left. As I was heading out, my instrument gauge started blinking like a Christmas tree (headlights were fine at the time). About 10 minutes later I got on the interstate and was driving when the headlights started powering off and on (not blinking, but like you were using a dimmer switch). At that point, the instrument cluster lights stayed on. I then figured since I was right behind my car with my friend, that I would just follow closely, turn off the headlights and go only with fogs. I did that for about 10 minutes and then the fogs totally went out. I switched back to the headlights and the headlights started blinking, but the fogs came back on. The fogs did not do the dimming like the headlights. Is there the potential that I have yet another dimmer switch bad, fuses, or just some screwed up wiring? Robb
Robb, it is a very good chance that the problem is in your headlight switch.
I had a very similar problem with mine with the headlights flashing and I would have to pull in to the side of the road, turn off the switch until the relay cooled down. I would then drive on again until they started flashing, pull in again, and so on and so on.
Remember, we used to trade in our cars when they started giving trouble like this, but now we are spending big bucks to buy them. Go figure!!! LOL
Dave
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Old 02/11/2006, 11:49 AM   #4
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I agree with Don, I had that same problem several years ago and spent a long time trying to figure out the faulty part. In the end it was the head light switch on the dash. The tale tale sign was how Hot it got after the lights had been on for a short period of time. A trip to the local NAPA parts store for a new switch solved my problem.

Ralph
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Old 02/11/2006, 11:54 AM   #5
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I have replaced 3 headlight switches in 3 different cars recently. It is your headlight switch.

2005 Ford GT (2000hp)226.2 mph in the standing mile, 2008 Superleggera UGR X Version (2000+hp),2014 S63, 89 IROC 30k miles, 150 shot NOS
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Old 02/11/2006, 01:28 PM   #6
Redwingrobb
 

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Thanks for the input. Somebody today told me it might be the relay. Any possibility of that? Robb


Wimbledon White GT/CS and 1968 Plymouth Barracuda Convertible
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Old 02/11/2006, 01:31 PM   #7
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Quote:
Originally Posted by Redwingrobb
Thanks for the input. Somebody today told me it might be the relay. Any possibility of that? Robb
doubtful

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Old 02/11/2006, 01:51 PM   #8
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Robb, the problem with the headlight switches in GT/CS is that they were designed for 2 headlights and 2 taillights but they are now running 2 headlights and 6 taillights. As long as all the grounds and contacts are perfect everything works ok but if any of the taillight sockets get a little corroded or a ground loosens a little the added load on the headlight switch fries it. When you buy your new switch it might be a good idea to buy another as a spare. The odds are you will need it some time in the future.

How about this one? All my lights work great except for the rear turn signals. The emergency flashers work, the brake lights work, the taillights work, and the front turn signals work.

Any ideas?
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Old 02/11/2006, 02:22 PM   #9
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Another suggestion to cool down the switch (after the burnt up one is replaced) is to switch to LED taillights. I did this with the sequential type LED taillights and love them. They twist right into the taillight sockets ----No changes required to any wiring. You can search for several threads on this on the site about the LED and sequential taillights. Casey
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Old 02/11/2006, 03:57 PM   #10
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I second the LED taillight thing. I have them on all my cars.

2005 Ford GT (2000hp)226.2 mph in the standing mile, 2008 Superleggera UGR X Version (2000+hp),2014 S63, 89 IROC 30k miles, 150 shot NOS
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Old 02/11/2006, 04:26 PM   #11
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One more thing to think about. Have your headlights been replaced with halogen bulbs? If so you are drawing to much current through your headlight switch and the breaker in it will cycle on and off just like you described. It happened to me on another Mustang.
Steve
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Old 02/13/2006, 08:14 AM   #12
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Quote:
Originally Posted by Mosesatm
Robb, the problem with the headlight switches in GT/CS is that they were designed for 2 headlights and 2 taillights but they are now running 2 headlights and 6 taillights. As long as all the grounds and contacts are perfect everything works ok but if any of the taillight sockets get a little corroded or a ground loosens a little the added load on the headlight switch fries it. When you buy your new switch it might be a good idea to buy another as a spare. The odds are you will need it some time in the future.

How about this one? All my lights work great except for the rear turn signals. The emergency flashers work, the brake lights work, the taillights work, and the front turn signals work.

Any ideas?
Turn Signal Flasher?

Steve in Missouri
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Old 02/13/2006, 08:53 AM   #13
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Quote:
Originally Posted by Perkchiro
Turn Signal Flasher?
I hope so since the only other option I can think of would be the turn signal switch, and I really don't want to go there.

Does anyone know if there are front and rear wires coming out of the flasher or is it just one main wire that runs all the lights?

As soon as I get this turn signal thing fixed I can get it inspected, insured, and licensed!!!
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Old 02/14/2006, 01:11 AM   #14
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Sorry for the bad news Arlie, but the turn signal flasher is before the turn signal switch with one wire in and one out. If the front are working, it's not the flasher. You might want to try buying some electrical contact cleaner and spray it in both sides of the connection from the T.S. switch at the bottom of the steering column. Sometimes the connections build up some oxidation and the current doesn't get through. It's a lot cheaper and easier than replacing the switch.
Steve
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Old 02/14/2006, 07:17 AM   #15
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Good idea, Steve.

I studied the wiring diagram last night and came to a similar conclusion but I figured that when I gutted the interior I might have pulled or cut the two wires that lead to the rear of the car. Never even thought about the connectors. It could also be that the wires pulled out of the connector. Looks like I'll be upsidedown tomorrow night tracing wires and connectors.

Notice I said, "tomorrow night" and not "tonight". I may be dumb but I'm not insane.....yet.
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