Power To The Trailer - Diesel Forum

hypoxia · 09-05-2006, 11:13 PM

2005 F250 factory Trailer Package & Brake Controller. I am not getting 12V to pin 4 on the trailer plug to charge trailer battery. The fuse is good. What am I missing?

Cool_Canuck · 09-05-2006, 11:20 PM

Engine running??
Power only available with key on.

hypoxia · 09-06-2006, 12:02 AM

Engine is running, this is also applicable to a friends 2000 F150.

hypoxia · 09-06-2006, 12:03 AM

If I knew what relay I could check it????

Faceplant409 · 09-06-2006, 01:39 AM

There may not be a key-on-constant run into the 7 pin plug. I had to run a wire for backup lights into my '96 plug... The plug was pretty easy to take apart.

Patrick

Steve Spaulding · 09-06-2006, 06:21 AM

[ QUOTE ]
2005 F250 factory Trailer Package & Brake Controller. I am not getting 12V to pin 4 on the trailer plug to charge trailer battery. The fuse is good. What am I missing?

[/ QUOTE ]

Was the relay installed?

rubystargoats · 09-06-2006, 04:13 PM

I had no power on my 2004 when new, the fuse looked good but when I checked it with a meter it did not pass current. did you do continuity check with a meter? On the 2000 the factory did not install the relay and fuse they were in a bag in the glove box. were they ever installed in his truck? THe owners manual shows all the fuse and relay positions.

hypoxia · 09-06-2006, 11:02 PM

I'll check that, It'll be a few days before I can get to it. Thanks.