If you ain't already taken it out (TS switch) you might ohm it in the 3 positions & see if the continuities at the pull apart connector are correct. white is power in from the brake light switch & with the stalk in neutral there should be continuity to the (2) out wires to the dr/pass large filaments in the rear 1157 bulbs & you could go behind the dr kick panel & jump fire there to see if everything rearward from that point is good (or not). www.mymopar.com has wiring diagrams. I hear they ain't 100% complete in some apps but for a bare bones 69 you should be good.