Meyer plow wiring woes

I have not installed a Meyer in years but I always toggle switched the lights. If you are unsure wire up the lights with the toggle switch.

"if i hook up the orange wire to my plow light harness orange wire, and supply the line with 12V."
Um, no. The orange wire from the modules, a 2 into 1 connection, would run inside to the orange wire from the controller, looks like you are using the 6 to 12 adapter. You do not add 12v anywhere. The orange from controller turns the modules on.

The orange wire is usually hooked up to the light switch inside the cab. The other end of the light switch is hooked up to a fused 12 volt supply, so you would be supplying power to the light modules to activate them to turn off your truck lights and turn on your plow lights. This setup was used with either the toggle switches for plow control or the old square electronic controller by Meyers. It was never meant to be used with a pistol grip controller, so that may be your problem. With the old controller, you can operate the plow regardless as to which headlights are on or neither lights. Be sure to hook up your 2 black ground wires on the light harness, or plow lights or turns signals will not work. Hope this works. You also may have an issue with DRL, which is daytime running lights. Hope this helps.