Toad wiring,combined or separate, didn't matter.

[klutchdust]

Wired my toad using the combined light theory based on my MH lights.Tested the finished product with my GMC pickup with factory plug and has "separate" lights and the toad lights

were fine. When the brake lights were applied and the turn signal on, the light blinked and the stop light went off. Marker lights work fine.

I used an adapter that plugs into the 7 pin and supplies just 4 pin . When they wire the plug on the pickup they have to wire it assuming the trailer will be using the 'combined'

system. Most small trailers and even larger ones only use 4 wires.

[enblethen]

Maybe this will help.
Combined MH to combined toad wiring
I use similar to this for my rigs.
I have combined on MH and separate on toad, but use reds on toad for turn signals.

[klutchdust]

FIRE UP wrote:

klutchdust wrote:

enblethen wrote:
There is two different configurations for the trailer connectors on some pick ups. One is for RVs and the other for utility trailers.
verify connector on pick up using these charts.
Configuration charts

I don't see a need to do that. My point is that truck plugs must be wired the same using the 3 wire to the rear lights method. I have towed dozens of different trailers with my pickup and the lights always worked the same.

Klutchdust,
You've just confirmed what I've been saying for decades when it comes to lights/towing. You don't have to be a rocket scientist to get the proper results when hooking up trailer/toad lighting. You just need to know what you've got, and, what you want in the end. There are adapters for everything on this planet. You just need to know which one to use, at which time and, it will come out PERFECT every time. Nice job.
Scott

Appreciate the efforts of posting links. I couldn't understand one link referring to the combined/separate lights and how to work with them, it didn't make sense.

[FIRE_UP]

klutchdust wrote:

enblethen wrote:
There is two different configurations for the trailer connectors on some pick ups. One is for RVs and the other for utility trailers.
verify connector on pick up using these charts.
Configuration charts

I don't see a need to do that. My point is that truck plugs must be wired the same using the 3 wire to the rear lights method. I have towed dozens of different trailers with my pickup and the lights always worked the same.

Klutchdust,
You've just confirmed what I've been saying for decades when it comes to lights/towing. You don't have to be a rocket scientist to get the proper results when hooking up trailer/toad lighting. You just need to know what you've got, and, what you want in the end. There are adapters for everything on this planet. You just need to know which one to use, at which time and, it will come out PERFECT every time. Nice job.
Scott

[klutchdust]

enblethen wrote:
There is two different configurations for the trailer connectors on some pick ups. One is for RVs and the other for utility trailers.
verify connector on pick up using these charts.
Configuration charts

I don't see a need to do that. My point is that truck plugs must be wired the same using the 3 wire to the rear lights method. I have towed dozens of different trailers with my pickup and the lights always worked the same.

[enblethen]

There is two different configurations for the trailer connectors on some pick ups. One is for RVs and the other for utility trailers.
verify connector on pick up using these charts.
Configuration charts