Question about 1988 Ford Thunderbird
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Posted on Jan 02, 2017
There are no relays for the headlights. Your problem could be from the headlight switch. You would have to check and see if you have power coming out of the switch on the low beam side. Check with a test light.
Posted on Dec 15, 2008
If there is power there, then it has to be the bulbs. The trouble that most people have is, they don't see how both bulbs could burn out at once... and they're right. They don't. But you see vehicles with one headlight all the time. They don't know it unless you tell them or they happen to see it themselves. Then the second light burns out, and they think it's a major catastrophe, when in fact, it's just bulbs. The high beam still works because the bulb is double filament. The only other thing it can be is the dimmer switch, and since you switched it to high, it appears to be working. However, if it's not bulbs, it still could be the switch.
Posted on Oct 07, 2009
I have heard it could be the Daylight Running Light module located under the dash above the brake pedal. The module controls both the daytime running lights and the low beam lights. The high beams are independent of this module.
I have the same problem. I am trying to buy a new module.
Posted on Feb 23, 2010
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