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Old Jul 25, 2009 | 12:36 PM
  #1  
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No running lights

I started my truck and then go to turn on lights, and theres no dash lights, nor running lights. I think its a relay if im right? I check the fuses and they seemed fine. Im just wondering which relay is for the lights? Or is it not a relay? Is it something different?


Thanks
Michael
 
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Old Jul 25, 2009 | 10:53 PM
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what year is your truck? My running lights and dash lights are on the same fuse. I would double check the fuses first.
 
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Old Jul 26, 2009 | 06:15 AM
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bad headlight switch? can happen. not known to happen very often.
 
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Old Jul 26, 2009 | 07:16 AM
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Like Chris said. What year truck can make a difference. They change the fuse block configuration from year to year.
 
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Old Jul 26, 2009 | 10:51 AM
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Michael.. you need to update your profile.. says you are running a 72 F100
 
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Old Jul 27, 2009 | 04:23 PM
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Sorry, its an 02 f350 7.3. So look again and found the fuse. Its fuse #17. So i replaced and it keeps blowing. So i also notice about a two weeks before this fuse blew the over head trip computer was working (i believe this are on the same fuse?) The about a week later i hooked up the trailer brake controller using the ford factory harness plug. then the fuse to the running lights goes out a couple days later.

I dont know if this is all related but i think i would just let you know and see if you guys have any ideas?

I took the voltmeter and was messing around fuse #17 spot on the fuse block and it all look good.

I dont know maybe its a short? If so where should i look?

Thanks Michael
 
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Old Oct 2, 2009 | 08:42 AM
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any update on this, my trucks doing the same thing.
 
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Old Oct 2, 2009 | 10:33 AM
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Any work you may have done to your truck recently Glenn that we could maybe point to as the culprit?
 
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Old Oct 2, 2009 | 01:02 PM
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no, thats the odd thing nothing has changed electrically. this has just started.
 
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Old Oct 2, 2009 | 05:45 PM
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Unplug your harness from the taillights. It should be a T Connector in there with like a lil black box. Unhook the box and the two ends that are now free hook together. I had the same issue on my 94' Ford Ranger. I didnt pull anything for a few years and the cover was long gone and it got alot of junk inside of it. I hooked to a trailer a few months ago and it just popped the 15amp fuse about five times before I got smart and found that out. It should work. Please update and tell me if it works!
 
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Old Oct 2, 2009 | 09:00 PM
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bump for ya
 
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Old Oct 3, 2009 | 12:22 AM
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One more thing...When you do that, it wouldnt hurt spray the connectors down with some eletrical cleaner and after that dries put some diaeletric grease on it for a better contact and it helps to keep the dirt and moisture out. You can pick up a small packet of that stuff for about a buck at an Advance Auto, or an AutoZone.
 
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Old Oct 3, 2009 | 10:04 AM
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Another random thought is to check all your overhead interior lights and bulbs for a short. Plus your courtesy light that is mounted on the outside of the cab with the third brake light. All those lights are on the same fuse on an '02. I had some water get into the outside light fixture and was blowing the fuse.
 
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