Grounding through the hitch
Elder User
Joined: Apr 2004
Posts: 797
Likes: 0
From: Wickenburg, AZ
I know Ford's heart was in the right place with the isolator relay, but it is something of a pain in the neck for load lights.
There are ways around it, of course. One way is to jump the Trailer Tow Battery Charge Relay in your Power Distribution Box. I don't know the connector pinout, though it wouldn't be terribly hard to get it with a voltmeter. The other way would be to modify the trailer's wiring so the power supply for the lights went to the breakaway battery (but don't forget to put a fuse in there). That worked great for me, since mine are front tack and the battery's inside there.
There are ways around it, of course. One way is to jump the Trailer Tow Battery Charge Relay in your Power Distribution Box. I don't know the connector pinout, though it wouldn't be terribly hard to get it with a voltmeter. The other way would be to modify the trailer's wiring so the power supply for the lights went to the breakaway battery (but don't forget to put a fuse in there). That worked great for me, since mine are front tack and the battery's inside there.
Fleet Mechanic
Joined: Oct 2004
Posts: 1,496
Likes: 3
From: Simpsonville, KY
I think the best way to get around it is to add a 12v power supply to the trailer in the form of a deep cycle battery (or a pair). That's what I have planned, but I have to save up the cash first. Between the batteries and the extra LED lights I'm looking at $1000 worth of upgrades.
Thread
Thread Starter
Forum
Replies
Last Post
