Custer Products uses the industry standards for wiring our plugs and transmitters. However, many times the wiring on a truck socket does not follow these standards. If this is the case, you should rewire your truck socket. Do not attempt to rewire the transmitter or light bar without approval from Custer Products. Any damage caused by rewiring these items will void the warranty.
If your truck has all LED lights, there may be a current load issue. If there is not enough current load on your truck socket, it may trick the transmitter into believing there is voltage being supplied to a pin that is not there. You can add a 560 ohm, ½ watt resistors to each of the signal pins on your wiring (marker, brake, turn signals) and that will add enough loaf to correct the issue. If you are not comfortable doing this, please contact us.