Bipeflier wrote:
You have a bad ground connection somewhere. Check, clean until you find it. Start with the connection to the tow vehicle and work from there.
I will second that and add to it.
One of the things that concerns me is the size of the wire used for the ground, I feel it may be a tad "Anemic" as it were.
but check the grounds both on the motor home (That is where MY rig had a problem) and on the towed ends of the hookup.
In my case they "converted" the flat 4 my MH came with to a 6 pin as part of the Remco LP-1 Lube pump install on my towed.
The conversion used a connector similar to a "Scotch Lock" which slices through the insulation and knife edges to the wire.. Though it can handle the current for stop/tail/turn lights, it can not handle all of them together.. So I bypassed it by soldering on some more ground and tying it to a good frame bolt nearby.
One SOLID hookup.
My problme was feedback killing my cruse control and left turn signal it was that bad.. Works great now.
