OK, I wanted to not have to buy the $75 plug and connector that fits a socket under the back of the truck. Then, the conenctor won't fit my trailer plugs, so I'd have to buy a plug and make an adapter...another $10. I decided to wire it like I did my other truck.
I used the wire splicers to connect all wires for the connector to the appropriate wire running to the lights, and ran a 12 ga. wire for the ground to a bolt on the frame. I know the ground is good.
Here's the problem, and it is the same problem with both camper and boat trailers that are wired exactly the same, and both worked with the old truck connector, which is wired the same as I did on the new truck.
The brake lights and tail lights work fine. When I put either trailer plug into the connector (which is new), and turn on the turn signal, it blinks once or twice and stops. It doesn't blow any fuses. I can remove the plug and use clip wires from the connector ground and one turn signal to the same sockts on the plug, and the one turn signal will work. When I plug them up and try either one, it blinks and dies.
My first thought was bad ground, but I tried running the ground wire to different points on the frame of the truck with the same results. The only thing I can see that might be a problem is that the wires running to the turn signals on the truck are 16 ga or less, nowhere as big as the 14 ga wires I am using. Any suggestions? Other than spending $90 or so for the dealer supplied plug setup.