Blinker, stop light, and hazzrds random operation - Ford Powerstroke Diesel Forum
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  #1  
Old 11-24-2013, 10:54 AM
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Blinker, stop light, and hazzrds random operation

I have a 1999 F350 Superduty Powerstroke 7.3L dually super crew that when its cold out, the blinkers, hazards, stop lights will all work. After the truck warms up and the farther we travel the turn signals will disappear, then after a while longer no hazards, if I travel over 1.5 hrs one way the stop lights will stop working. I have replaced the relay in the center of dash, (above gas pedal near the center of truck) I have checked all fuses. Are there any other relays hidden inside??? Why when I loose turn signals do I still have hazards and stop lights. And why do they gradually disappear over time. ( I do notice it happens faster with the heat on high). I am very puzzled, it is the opposite of everything I have researched on the forums. Also what are the two small relays in the same small box with the turn signal flasher. Any help would be much appreciated. Thanks
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Old 11-24-2013, 11:03 AM
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Check your wiring harness that is in your steering column, sometimes it gets pulled tight from using the tilt wheel and can cause some strange lighting issues!!!
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Old 11-24-2013, 12:58 PM
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Thanks GregSD, I found it. not in the column, but near where those column wires trace back to firewall. If you push up on the harness, the blinkers work, if you pull down, it does not work. I'll have to move the remote start to see whats the problem. And no its not the remote start, I've been installing those for over 20 years & I always solder my connections. pretty sure it a break in the wire or a chaff some where. However I did have to remove the old remote start out entirely and start completely over. maybe I missed something.

Last edited by mhelm; 11-24-2013 at 01:30 PM.
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Old 11-27-2013, 07:29 AM
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re: turnsignal problems

I found it and its fixed, Thanks to GregsSD

http://i1132.photobucket.com/albums/...2-38-00_45.jpg

http://i1132.photobucket.com/albums/...2-53-53_83.jpg

http://i1132.photobucket.com/albums/...-26-00_455.jpg

http://i1132.photobucket.com/albums/...3-37-46_55.jpg
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Old 11-27-2013, 01:07 PM
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Glad to help point you in the right direction!

I am just passing along info that I have read about here in past years
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Old 08-27-2014, 05:27 AM
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RE: hazards, tail lights, and turns problem

UPDATE: The turn signals and the tail light issue is solved, but,,,,The problem of the melting relay is not solved, we just quit using hazards when we pull over. I was told that we have too many light bulbs on our trailer. We have 16 (I think), So if you multiply 16 x 1.5 amps (per bulb) that comes to 24 amp. Which would make sense to why it is melting the 20 amp relay inside the truck. Its that awesome relay under the middle of dash, that some ford engineer had his head up his *** when he said, " oh this would be a perfect spot for the relay" SOB..... We are thinking of switch out to all L.E.D. light bulbs, cheaper than new fixtures. Anyone else have this problem? Or are we chasing our tail??
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