Troubleshooting 4-way And 7-way Connector On A 2012 Toyota Sienna

Question:

We had a friend install it for us, but we cant get the lights on the trailer to work at all, The problem isnt the camper, since we checked it with a different vehicle. He checked to see if the was power coming through, and it is.

asked by: Elmarie V

Expert Reply:

You have narrowed your problem down to your tow vehicle. Since your camper's lights work when it is hooked up to a different tow vehicle, it is on your vehicle side. You will need to check the connections of your Adapter 4-Pole to 7-Pole and 4-Pole, part # 37185. This will require a circuit tester, part # PTW2992. I would check your grounds to make sure they are touching bare metal, paint can interfere with this connection. You can use the circuit tester to check the outputs from your 4-way and 7-way connectors.

I have included a product description link, video review links, and a weblink to troubleshoot your 4-way connector below.

expert reply by: Mark Smith