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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

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  #1  
Old 04-14-2011, 08:03 PM
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Wesley R. Cole
F*^&%$ HEADLIGHTS ARE THE DEVIL!

Been havin a slight blinking issue with my headlights, but it was only once in a great while......Now its constant....I cleaned my grounds, the one where the starter relay grounds to, and the one near the D/S headlight....Is there another that I may have missed?

Untill I get the issue resolved, I can't drive after dark...

-Wes
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  #2  
Old 04-14-2011, 08:04 PM
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As in, the lights are turning on and off intermittently? Id go for the switch.
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Old 04-14-2011, 08:07 PM
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A new headlight switch will go a long way on fixing this,,

You see there is a circuit breaker in a headlight switch, and they get old, the contacts in the switch get old and have more resistance that builds HEAT, that heat is making your circuit breaker go on and off....
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Old 04-14-2011, 08:07 PM
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Wesley R. Cole
Imagine a "Special" kid playing with the headlight switch....or a set of LED's in a blinker socket.....They're blinking like a zillion times a minute...

-Wes
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Old 04-14-2011, 09:44 PM
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I would. Check the harness ware it plugs in the the harness that comes out of the cab. If its lose road vibrations could cause it to flicker, IF that looks good and tight, try to pull it apart and check for melted pins, There are body grounds for each headlight on the core support. You can try to install a jumper from the Neg battery to the P/S headlight ground. If all that fails then I would try a new switch. I had a headlight plug go bad and made it flicker .. but was only one side that blinked. I take it they flicker / blink both at the same time.
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  #6  
Old 04-14-2011, 09:48 PM
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OFF-You are correct, they both flicker at the same time, randomly.....And even when the truck is shut off, parked....

-Wes
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Old 04-15-2011, 02:49 AM
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I would replace the headlight switch and then get a pair of relays for the headlights.
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Old 04-15-2011, 09:12 AM
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Quote:
Originally Posted by TexasGuy001 View Post
I would replace the headlight switch and then get a pair of relays for the headlights.
also plan on repalcing the main light switch pigtail as well they were really common to burn /melt in the middle
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  #9  
Old 04-15-2011, 09:14 AM
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Wesley R. Cole
Ok....Looks like I getta dig in the dash for a while....UGH ....

Btw, whats the relays for?

-Wes
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Old 04-15-2011, 09:22 AM
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The relays take the load off the headlight switch, so it don't go out in another 25,000 miles.. Plus they say it makes the headlights a little brighter...



Quote:
Originally Posted by SideWinder4.9l View Post

Btw, whats the relays for?

-Wes
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  #11  
Old 04-15-2011, 09:28 AM
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Wesley R. Cole
Quote:
Originally Posted by White 97 xlt View Post
The relays take the load off the headlight switch, so it don't go out in another 25,000 miles.. Plus they say it makes the headlights a little brighter...
Ahhh, I see....I thought they made them a smidge brighter....wasn't sure though....

Hmmmm.....I have the Sylvania Silverstars as is....So the relays will make them BRIGHTER?
-Wes
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  #12  
Old 04-15-2011, 10:49 PM
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Wesley R. Cole
Seems to be a heat thing....I turn the lights on, they are fine for a minute or so....Then they heat up, they flicker....Lettem cool, they're fine...Till they heat up again....Any suggestions?

-Wes
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Old 04-16-2011, 01:49 AM
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Quote:
Originally Posted by SideWinder4.9l View Post
Seems to be a heat thing....I turn the lights on, they are fine for a minute or so....Then they heat up, they flicker....Lettem cool, they're fine...Till they heat up again....Any suggestions?

-Wes
Sounds more and more like the switch...did you ever replace it?
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Old 04-16-2011, 01:55 AM
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Gonna do that today....What is up with the heating/cooling of thelights and them flickering?

-Wes
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Old 04-16-2011, 01:59 AM
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Corroded, pitted, or arced contacts can heat up due to the high resistance they provide, which could cause a momentary loss of contact.
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Old 04-16-2011, 01:59 AM
 
 
 
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