Do you have a good 12volt power or a good ground? Do an ohm test on the grounds you want 0. This sounds dumb but are you using the rite bulbs their is a 1 and 2 filament.


If your tail lights work your ground is probably good. Thy use a 3 wire design one is 12 hot for the tail lights one is 12 volts hot for the brake lights and one is ground. The tail lights and the brake lights share the same ground get my drift?