Troubleshooting Short to Battery Message with Prodigy P3 Controller When it Rains

Question:

I have a Tekonsha P3 brake controller and the Curt wiring harness referenced here on a 2006 Dodge Ram 3500 diesel. Since the install of the second 7 way in the bed with the Curt harness I get a message on my brake controller that there is a short to the battery. This only happens when it is raining very hard while Im driving. It will do it even if there is no trailer attached. Suggestions where to start looking?

asked by: Todd P

Expert Reply:

Water is seeping into the new 7-way most likely and is causing a short between the 12 volt output circuit and the brake output circuit. The water is somehow getting introduced into the round connector behind the 7-way. It could also be at the 7-way at the rear of the vehicle too.

I'd recommend taking the connector apart to allow it to dry and then using dielectric grease like part # 11755 which will prevent the water from getting back in.

expert reply by: Jameson C