I'll assume that this doubler has four wires, a plus and minus 6 volt input and a plus and minus 12 volt output. If this is correct then I'll take a stab at it. #1... output from light switch for tail lights. Cut or lift the output wire for the taillights and hook the doubler (+12) wire to the one that goes to taillights. BTW all (-6 & -12) wires go to good ground. The cut wire from the lightswitch goes to the (+6) volt input. This should give you 12 volts at your taillights. Note: if your front marker lights are 6 volt and come on with your taillight then you must find that junction, cut and reattach to the input (+6) of the doubler where the 6 volt output of your lightswitch goes. #2...stoplight and turn signals. The brake lights with turn signal option should start at the back or down stream side of the brake switch. The orginial wire is lifted. A wire should be installed on the back side of the switch that goes to the (+6) volt side of the doubler. Another wire is then run from the (+12) volt side of the doubler to the orginial wire that went to the back side of the brake switch and then to the brakes lights and such. . The turn signal front bulb also must be addressed. If stand alones (not joined with your parking lights) then change bulb to 12 volt and replace your 6 volt turn signal cans to 12 volt. If front turn signal bulbs are joined (dual filament) with parking lights then #1 above needs to be "tweaked" and bulb and cans changed. It's early on the 'right coast' and have only a 1/2 cup of coffee in me. Hope others read and tweak this if (I'm sure) I missed something or am completly wrong.
Last edited by beltfed; 09/07/2011 10:11 PM.
