4-way flat to 7-way RV blade

[Topher]

2000 TJ Manual recently regeared to 4.88 running on 33s (eventually 35s).
Years ago I installed the typical 4-way flat wire harness and it has worked fine. I purchased a TigerMoth trailer and it uses a 7-way connection. I bought the Curt 57184 4-way flat electrical adapter. It has the 4-way connection plus Yellow, Blue, Black & White. The yellow wire is auxiliary/back-up lights, blue is electric brakes, black is power to be used with an inline fuse & white is ground. I don't need the yellow or blue wires. Ground is easy to figure out, but I'm not sure where I should connect the power cable. Do I get one of those fuse to wire things that goes directly into the fuse box? If need be I can run the wire through the firewall, I just don't know where to connect it once in the engine bay. I don't want to go directly off the battery as the trailer would drain the Jeep while its not running. I have an empty 20 amp fuse for Auto Trans (See Owners Manual). It's a manual so was wondering if I could use this fuse opening for the power source?

 

[Todd Ockert]

I think I would run it directly to the battery, but place a relay that is tied to something that is only on when the Jeep is running.

Not sure how much power that line could be pulling to the trailer, and that is the only concern that I can think of.

Plenty of diagrams on how to connect a relay into the system with a google search.

Todd

 

[macgyvr]

How often is it going to be sitting with the trailer hooked up to it without the Jeep running? If the trailer has a battery that the 12 volt from the Jeep is charging, it's not going to drain the battery on your jeep that much, unless it's a really long period of time. Like Todd said, I think that I would run it straight to the battery on the Jeep. They make re-settable circuit breakers just for running the power wire from the battery to the trailer wiring.

You could also put a kill switch on it too...

mac 'all wired up' gyvr