If I remove the 305 relay, and install a jumper from terminal (87 - 30) I get a constant live terminal at the trailer plugin. Is this fused upstream in the wiring harness? Where is that fuse located? and what is it's rating? If not I will put in a breaker.

Are there any other items run off of this relay?

Is anything run off of the 87a terminal?

 

Need YMM.

Relays should be fused, but it never hurts to have more fuses or even better breakers.

 

Please explain YMM?

I know I am going to regret asking that, but it's not coming to me.

Thanks,

 

04 f350 CC 6.0

I knew I was going to regret that question.

 

fuse#115 amps 20A** Trailer tow battery charge

If the fuse is good, try swapping some relays around, that one is most likely shot.

 

Relay is good, I want to remove it so that I have a constant "live" feed.

Our horse trailer load/interior lights are connected to this circuit and is a pain to turn key on and off to run lights for the day.

This seemed like the best option to use unless there were some other circuits I wasnt aware of.....

For longer stays in the trailer we bring a deep cycle along to plug the trailer into.

Thanks for the help.