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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

HD headlight harness issues

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Old Mar 4, 2024 | 04:47 PM
  #16  
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From: Saskatchewan Canada
Originally Posted by Anonymous12

Did you hook up both fusible links? Are they good?

Did you hook up both grounds? Are they good?
 
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Old Mar 4, 2024 | 04:56 PM
  #17  
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From what I can tell his truck does use 9004 bulbs but the harness is for 9007 bulbs

Maybe you can repin the sockets

Edit: I see Edgethis beat me to it while I went into edit the first time.
 
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Old Mar 4, 2024 | 05:00 PM
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From: Tobyhanma, PA
Originally Posted by McLeod
From what I can tell his truck does use 9004 bulbs but the harness is 9007 bulbs
If this is the caee, All is not lost! You could rewire the harness ends to match what your truck and bulbs require. A bit more work but doesn't cost anything except time and some elbow grease.
 
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Old Mar 4, 2024 | 05:10 PM
  #19  
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The only problem I can see is if he sells the truck to a new owner who has no idea.

If OP has been sending power to ground there may be some blown fuses at this point so check thoroughly
 
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Old Mar 4, 2024 | 06:21 PM
  #20  
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I will look into the power/ground. I’m thinking that the low and high beam are switched in the harness looking at the diagram. Don’t plan on ever selling it, but if I do they are already screwed, the viper alarm creates a rats nest under the dash.
It is for a 9007, I will check fuses. Thanks for the help!
 
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Old Mar 4, 2024 | 09:53 PM
  #21  
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my bad i forgot you had a 88 not a 92-97, yes you have a 9004 bulb setup so your bulbs are right. so you will have to modify the bulb sockets and replace the bulbs or you must modify the harness and keep your bulbs. thats the cheaper route. may be easier depending on how this harness looks
 
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Old Mar 4, 2024 | 10:09 PM
  #22  
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Originally Posted by AuroraGirl
my bad i forgot you had a 88 not a 92-97, yes you have a 9004 bulb setup so your bulbs are right. so you will have to modify the bulb sockets and replace the bulbs or you must modify the harness and keep your bulbs. thats the cheaper route. may be easier depending on how this harness looks
I contacted bronco graveyard to see if they would send me the correct harness. If they won’t then I’ll modify the one they sent me.
 
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