Vehicle winding to isolate trailer wiring

[Living in the Past]

Years ago when I installed a factory wiring setup in a tundra that the main power comes from it own circuit not the lighting circuits. I would like to do this to protect my forty plus year old wiring in the vehicle. Problem is all the later converting I found that will do this aren't design to convert the separate turn signal and brake signal lamps into a single lamp. Not needing to do that just looking for a something that isolate the vehicle from the trailer. Could make one but figure something solid state would draw a lot less on the factory wiring. Anyone know of one that's solid state?

Also has anyone found a bracket that will mount the flat four pin trailer plug to the vehicle? Looking in the auto part stores and it seem every other type of plug has a mounting bracket. Guess that's why you see this hanging down in the back of vehicles.

 

[ntsqd]

I keep waiting for something to tear off the flat 4 hanging under our CTD. Then I'll have justification to upgrade the other trailers to 7 pin connectors.

I did what you're asking for with relays on my FJ60. It also does the brake and turn signal conversion. The only downside, and I don't terribly care about it, is that the turn signals will blink in phase with the vehicle with no brakes applied and will blink exactly out of phase when the brakes are on.

 

[Living in the Past]

I keep waiting for something to tear off the flat 4 hanging under our CTD. Then I'll have justification to upgrade the other trailers to 7 pin connectors.

I did what you're asking for with relays on my FJ60. It also does the brake and turn signal conversion. The only downside, and I don't terribly care about it, is that the turn signals will blink in phase with the vehicle with no brakes applied and will blink exactly out of phase when the brakes are on.

I used one of those off the shelf converts on my FJ62. I may opt to go the isolation route at some point. Since the wiring is in great shape and the area I spliced into the wiring was in the weather tight compartment not to concerned. Besides the military trailers I pull with it just have tail lights. The vehicles I'm worried about are twenty years older and connects are in the frame rear crossmember. No plans to upgrade to seven pin. Have two newer V8 Toyotas that came from the factory wiring for trailer brakes.

I do have one four pin bracket that came off a early 100 series. Just want to know if I have another option than heading to a junk yard. Guessing around ten years ago most vehicles had the seven pin if they were factory equipped to tow.