7-Pin Wiring.... Which To What?

Howdy,

Hopefully the reset of the ECU has solved my "trailer disconnected" problem on my 2019.

Even if... the trailer side connection is floppy loose and I bought a replacement Pollak 760 that fits PERFECT! Nice snug contact that almost clicks in place! Takes effort to remove. Most highly recommended as well.

That said I understand trailers, mines a 2019 Airstream Sport 22FB, don't always use same color code. So matching colors from a chart to my trailer may not work.

I have the trailer side wiring diagram and know which colors go to which but don't know which sockets on the Tundra relate to which.

Here's my Airstream wiring diagram.


Thanks,

Greg

 

Thanks but..

A quick look shows my problem.

Yellow is back up in my trailer, left turn and brake on photos..... Other problems as well...

I've seen at least 3 different configurations counting my wiring diagram...

I have little faith Toyota follows this scheme too...

Thanks,

G

 

Can't blame you for lacking faith...I would confirm the truck terminals with a test light, forgetting about wire colors.

Have a helper apply the brake, turn signals, etc. with the test light on different terminals until you have them all identified and recorded. Then install the connector on the trailer, connecting each color wire (known) to the same function position as the truck terminals. Connect the trailer power cord to the truck, and verify each function from truck cab to trailer rear.

 

Ignore wire colors, go by functions / pin position in the plug / socket. That part will be correct on your truck, and should be on your trailer. Regardless of wire colors.