Trailer brake/light issues
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Senior User
Joined: Aug 2009
Posts: 164
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From: Everett, Wa
Trailer brake/light issues
My prodigy 3 brake controller is saying no trailer connected. I don't know if this will prevent me from seeing a hot when the brakes are applied or when the manual brake lever on the p3 is apllied.
either way the blue wire at my trailer plug isn't getting any juice.
Also I'm not getting any left turn signal/brake.
Aside from distro box fuse 1(trailer left turn/stop) and fuse 28 (trailer brake controller) are there any other fuses/relays that can cause this or do I need to start tracking the wire?
Is the orange wire for trailer battery charging?
I've read about "tow relays" that came in the glove box what slots did they go into and could they cause this?
Thanks for your help,
Brian, E99 F250 psd stock
either way the blue wire at my trailer plug isn't getting any juice.
Also I'm not getting any left turn signal/brake.
Aside from distro box fuse 1(trailer left turn/stop) and fuse 28 (trailer brake controller) are there any other fuses/relays that can cause this or do I need to start tracking the wire?
Is the orange wire for trailer battery charging?
I've read about "tow relays" that came in the glove box what slots did they go into and could they cause this?
Thanks for your help,
Brian, E99 F250 psd stock
Senior User
Joined: Feb 2004
Posts: 111
Likes: 0
From: Lino Lakes
I had a similar issue, it ended up being where my trailer lights plugged into the wiring harness. (round socket) It was loose and some water had gotten into it. I cleaned and reconnected it and everything was great.
