Tundra OEM tow harness (housing & 7 pin connector)

[ALL MOTA]

I'm planning to buy an OEM "tow package" from the dealer and was wondering if the wiring harness that comes in the package includes the plastic housing (female socket) for the 7 pin connector. The parts guy wasn't sure, and all he saw in the book was a 7-4 pin adapter. Any info would be nice.

[toyotafreak]

Not exactly what you asked, but our '03 Sequoia tow package included just the hitch receiver and bumper jack for 7-round trailer plugs. Our boat uses 5-flat, so we've had to buy a 7-round to 5-flat adapter.

Hope this helps.

[RockyMtnRay]

Originally Posted by ALL MOTA

I'm planning to buy an OEM "tow package" from the dealer and was wondering if the wiring harness that comes in the package includes the plastic housing (female socket) for the 7 pin connector. The parts guy wasn't sure, and all he saw in the book was a 7-4 pin adapter. Any info would be nice.

The OEM tow package for year truck (actually any Tundra made before '03) was wired for only a 4 pin connector which only provides power for external trailer lights (stop/turn/clearance markers-taillight). If you're planning on towing a trailer with electric brakes and a 12V power wire to the trailer battery, you're going to need to do a lot of wiring yourself. The 7 to 4 adaptor provides the means to get the external trailer light (and ground) circuits to the 7 pin bargman connector...you will have to do your own wiring to get the other circuits connected...namely, power from the brake controller, 12 V power wire (for the trailer battery), and optionally a line from the backup lights to the center pin on the bargman connector. There are some instructions in the TS club garage for how to do the brake controller part of the job.

It took Toyota 4 model years before their engineers clued in that lots of people pull bigger trailers with these trucks and need a 7 pin connector (and a trailer brake controller interface). So, Tundras and Sequioias made from '03 onward (like mine or toyotafreak's) do have a 7 pin connector in the OEM/factory tow package. The '03s and onward also have the underdash connector for a trailer brake controller and all the associated wiring for the brake controller and 12V battery line to the 7 pin connector. They even have power for the center pin from the backup light circuit...so even the backup lights on my trailer actually work!

[ALL MOTA]

Thanks for the clarification.

Now my next question... I assumed when I saw 2000-2002 Tundras w/ factory tow packages, the little black plactic housings were all 7-pin connectors, but now that you clarified that these Tundras (00-02) have 4-pin, I would just like to know that if I order the OEM package from the dealer that I will be getting a housing like that. I just hate seeing cheeeeesy 4-pin flat wiring hanging from the bumper. It looks very tacky!!! I would like something that looks clean (close to factory). Thanks!

[Todd Fortin]

I have 2003 Tundra with Tow package. I cant find the male side of the 7 pin connector for trailer brake. under the dash. can someone help me locate it.

Thanks