How to Wire a Mini Truck to be Flat Towed by a 1990 Holiday Rambler Motorhome

Question:

I have done all of the preliminaries My four prong Flat is hooked up right and I have the wires to the rear of the truck. when I hit the brakes the turn signals come on with the parklites.Of course I have tested and found which wire is which.I am thinking I am missing something can you help?I need to have signals and brake lites as well as tail lites.Is there an adapter for this? Motor home is a 90 Holiday ramblerGMC Chassis and the truck is a 90 subaru sambar mini truck right hand steer.need help with my nightmare...Thanks in advance!!!!

asked by: Robert H

Expert Reply:

Wiring your Subaru Sambar to be flat towed by your 1990 Holiday Rambler motor home will require the installation of diodes inline with the Sambar taillight wiring. You will need to start with a diode kit like the Tail Light Isolating Diode System with Wiring Harness, item # 38955.

We have detailed instructions for wiring a towed vehicle, see link, and I have attached a diagram, see link at right, that shows how to wire the towed vehicle. We also have a video installation for you to review, which details installation of the wiring harness. The physical installation and vehicle wire colors will be different, but the wiring will be the same on your mini truck. A circuit tester, item # PTW2993, will be needed to determine the correct wires to make connections inline on the vehicle.

expert reply by: Robert G