No power to tow vechicle

[ANGUSB]

I have a 2002 Beaver Santiam and tow a 2003 GMC onvoy we traveled all last year with no issue,s as far as turn,brake lights & flashers all worked. Got coach out of storage to be ready for this summer and hooked every thing up and no power to pig tail from coach. We have a 4 prong coming out from coach to onvoy.All tail and turn signals and brake lights work on coach and used 2wires to test from battery from onvoy pig tail on onvoy all worked on onvoy. Could their be a ground some were that i am not finding. Can use the help. Thanks

[lanerd]

First thing I'd do is check for a blown fuse. Should be one between the 12v connection to the motor home (battery?) and connection to the connector.

You mentioned you have a 4-pin connector. Is this just for 12v power to the tow (sic) vehicle. Don't you have a 6-pin or 7-pin round connector for the lights and power? If only a 4-pin, that would only be for lights...not for power and supplemental brakes on the onvoy (sic).

Look for the fuse, it's gotta be their (sic) someplace.

Good luck