Today I hooked up a battery on My 66 C-10 (fresh out of a field)to see what does & doesnt work. Seems like most things are working except for the exterior lights. The grounds appear good & all my curcuits in the fuse panel are powered up, & the headlight switch test good, power in/power out. There is no juice out of the firewall to the lights front or rear...do these circuits run throught the turn signal switch? The switch feels broken by the handle but I havent inspected it yet. What might this be???

Thanks again guys!!