98 LT Wiring for Brake Controller???

[superbeas]

new to forum, just got my 2 door a few weeks back...trying to hook up my electronic brake controller...figured out the stop light location pin on the electronics module behind the parking brake and got the harness unraveled from the back to hook up 6 pin connector and unraveled the wire pack in engine compartment near firewall, so i've got the Orange wire to aux power stud on under hood fuse box and blue punched through firewall for e-brakes, but i can't figure out which wires under the dash are for positive and negative. never been good at the volt tester / light tester process and was wondering if someone had wiring diagrams or could tell me exactly which wires under dash would be suitable for my + and - wire taps from the brake controller???? Thanks!!!