How to get constant power to 7 pin trailer harness
 

I'm putting in bed lights on my truck and I want to make the 7 pin trailer harness hot all the time so i can just splice into that insted of running a wire from front to back theres a thread about this in the 09-present but i can't seem to find any threads about the 04-08 f150's. thanks in advance

Really? Nobody knows?

How are you wanting to be able to switch the lights on?

Are you going to have a switch, Or do you want them to come on when you turn the headlights on or something? There is no wire that i know of is hot at all times. Even if there is you would need a switch to turn the lights on or off.

Yes I have a switch In the bed already and I was looking for ways to not have to run a wire from front to the back and I found a thread on the 09- present section but there fuse boxes are totally different than ours the guy had to put a jumper in place of one of the relays to make the trailer batt charge or whatever it was stay hot all the time and I was just wondering what relay that would be on our trucks and if anyone else has done this

Search
 

did a search on your problem, and found this post which might solve your problem with power, then you need to switch them

https://www.f150forum.com/f2/battery...o-power-32405/

Yeah no that's not the problem I just want to find out how to get constant power to the trailer charge (without the key being on) so I can tap into it for my bed lights

Makes it hot.
 

By installing the relay and fuse, it makes the wire hot in your trailer connector. Then you can tap into that wire for your lights, through your switch.

If you look into your truck's 7 pin connector, the pin/terminal at 1'oclock should be hot all day and all night long, if and only if, you have the relay and fuse. They are standard on all trucks.

http://www.etrailer.com/Merchant2/gr...u18379_800.jpg

Well mine never came with a relay can't I just put a jumper in place on the relay?

Bump