Weirdest trailer wiring issue ever. Need help badly - Ford Powerstroke Diesel Forum
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  #1  
Old 01-15-2014, 03:12 PM
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Weirdest trailer wiring issue ever. Need help badly

Ok I have a 97 f350. The trailer is a 35 foot gooseneck. Used a power probe pro to figure out which wire is which. So I hooked them up Into a brand new 7 way trailer plug and hooked it to my truck and everything is jacked up. As soon as I turn the key my rear lights come on and also on the trailer. It's not the running lights or brake lights because they are too dim. My blinkers work. But as soon as I hit the brakes I lose lights on the trailer. This is where it gets wierd. To see if my wiring was wrong I hooked it up to my buddies 06 f150. Everything works perfect!! So then I say well it's my truck. I then go and hook the lights on a 18 foot car hauler. Guess what. Everything works perfect!! What's the deal. Need help badly.
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  #2  
Old 01-15-2014, 03:51 PM
Can you hear the derail??

 

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The 18 foot car hauler a 7 pin plug? And are you using the same plug for both trailers?
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Old 01-15-2014, 03:59 PM
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Yes both are 7 pin and using the same location.
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Old 01-15-2014, 04:30 PM
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grounds

check your grounds. DC is funny with bad ground. Do not rely on ball metal contact.
Hope you figure it out...
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Old 01-15-2014, 04:36 PM
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Ok I understand the whole grounds thing but why does it work on my buddies truck
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Old 01-15-2014, 04:37 PM
Can you hear the derail??

 

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Both trailers have brakes?
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Old 01-15-2014, 05:08 PM
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Yes both electric brakes
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Old 01-15-2014, 06:06 PM
Can you hear the derail??

 

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It's funny Kause were texting the exact same thing too
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Old 01-15-2014, 06:17 PM
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Re wire it all. Start over and do it correctly because it's wrong.
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  #10  
Old 01-15-2014, 07:34 PM
Almostdunfukinwidit


 

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Send a message via Yahoo to Dave
Swap your brake activation wire and your accessory wire on the truck end.

Sent from AutoGuide.com App
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