1963 c10 starting issue

[nutsfor59]

hi,when attempting to start my truck i get nothing !! no dash activity.....nothing !!! unless i run a jump wire from the battery over to the horn relay,obviously this is not normal,have not found a wiring diagram yet for dummy light dash,i got a alternator wire harness from lmc but the colors dont match what i find in books,soooooo what wire go where on starter,coil,horn relay etc and what color are they supposed to be ???? did these old harnesses have fusable links or something like that ??? my harness seems to be intact and no eveidence of hacking /damage so why does nothing happen when you turn the key ????hhmmmmmmmmmmm

[61_FL_Apache]

No fusable links that im aware of.

I believe there is a voltage regulator near the horn relay. Check to make sure you have 12v at the ignition switch. See if you have power at the coil.

I dont have the link to the wire diagram, but im sure someone will post it for you.

[64thunder]

assuming the 64 diagrams the same

[nutsfor59]

hi and a BIG THANK YOU !!!!!, colors seem to be the same as well !!!my 63 wires are a lil different and the engine harness i got from lmc matches your digram,thats where the confusion partially came from tracing ,hooking up etc,thank you !!!

[bj383ss]

Nuts I had this very same problem and my voltage regulator was bad. Bought a new one at Autzone cheap Duralast for now. Everything works now. I used the same diagram as above to trace down where the voltage stopped.

Bret

[nutsfor59]

thanks,problem turned out to be bad 2 promg plug on back of alternator !!,AFTER i blew 40.00 for that same regulator you speak of,my biggest pain in the @#$$ PROBLEM NOW IS WHY NO JUICE IS FLOWING THRU THE INSTRUMENT LIGHT FUSE,I CAN GET DASH TO LIGHT IF I RUN A HOT LEAD TO IT but even if i do that the dash lights still wont dim or brighten !!! any ideas ???? should this spot aleays have juice ?? no juice at either side of this fuse !!,back of fuse block is fine,3rd new light switch,!!! what gives !!! ????