Troubleshooting Non-Working Diode Wiring With A Hot Ground

Updated 06/11/2024 | Published 06/10/2024

Products Featured in This Question

Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Way Coiled Adapter Cord

(3358)

$186.37

Dielectric Grease for Electrical Connectors, 2 oz.

(1489)

$10.79

Loctite RTV 598 High-Performance Silicone Gasket Maker - Black - 2.7-Fl Oz Tube

(190)

$8.71

RoadMaster 6-Wire Trailer Connector - Vehicle End

(371)

$26.26

Question:

I have had Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit installed for a year. All of a sudden when I connect to my RV the wiring doesn’t work. If I am not connected to RV my car works fine. I suspected the diodes so replaced them. Still nothing. For some reason my white wire ground is the only one that lights up with tester.

asked by: Roberto R

Expert Reply:

Hey Roberto,

If your ground is showing power then the contacts in the backside of the 6-pole socket from the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267 have likely corroded and are touching. Once the wires are in we usually fill the rubber boot up with some RTV gasket maker # LT37467 to prevent corrosion.

You'll want to take the 6-pole socket apart and likely replace it with # RM-910030-7. You may also need to trim off a bit of the wiring if it's corroded or brittle before installing the new socket. Once installed and all wired up you'll want to load that rubber boot up with gasket maker # LT37467 and you can use some dielectric grease # 11755 on the front connector pins to help protect them as well.