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tail lights not working

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Old Jan 16, 2008 | 07:42 PM
  #1  
TheMech's Avatar
TheMech
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From: under the hood of my truc
tail lights not working

my 78 f-150 4x4's tail lights work...part of the time. sometimes both tail lights show up sometimes only one, and my brake lights do the same, it seems like they rotate which one's going to work for that night. i have replaced the lights and still have the same problem. could this problem be caused by a bad lights switch? thankyou for any advice on this.
 
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Old Jan 17, 2008 | 12:15 AM
  #2  
wdfp's Avatar
wdfp
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Joined: Nov 2003
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From: southeast Idaho
More than likely a ground problem in the pig tails check the wire from them to the body and where they connect inside the pigtail, the best place to start anyway
 
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Old Jan 17, 2008 | 02:23 PM
  #3  
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wintremute
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From: Graves County, KY
2nd on the grounds. Every time I've had a lights issue it's been a bad or intermittent ground. PB blaster and some sandpaper usually does the trick.
 
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Old Jan 30, 2008 | 10:04 AM
  #4  
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TheMech
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From: under the hood of my truc
thanks, found out is was the ground and both light sockets were shorting, both are bright and working awesomely. thanks again
 
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Old Jan 30, 2008 | 10:15 AM
  #5  
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Rambo76
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Glad to see you found it. I had trouble with the taillights & rear side marker lights. Mine ended up being the wire right after the gas tank on the frame. I think it is a pretty common prob with wiring that is this old.
 
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