Headlight Relays. 1967 GM Fullsize
HD Power point with Alternator and Battery feed.
Dual 15a Little fuse fuse holders for H/Low beam power to relays
Small Red with the crappy blue lug is the new 12SI Alternator voltage sensing, can't solder onto a fusible link guys!
Side spade lugs; Black counter clockwise is a fusible link for body power and the clockwise is a straight 12g wire to PW breaker.
White to Orange fusible link is Alternator field to Ignition switched source.
Still need a short unfused link across to power the horn relay.
Black is horn button ground and green is to horns.
As far as the relay triggers and lamp feeds, I went back along into the harness just before the drivers side lamp split off. Opened the wrap, cut the LT Green high beam, and Tan low beam. Spliced in the triggers downstream and the lamp feeds on the upstream side of the cut. Grounds for the relays combine into one and are grounded on the driverside firewall ground post. Tidied up, wrapped everything in harness tape. Manipulated and routed as close to stock. The battery feed looks sad, see the big lump wrapped in tape? It's the main harness power splice weld with the old Alternator feed cut out and pulled down the harness.
The factory grounds need to be redone. They're crap. The fuse holders need some kind of strap or they'll likely virbrate the connectors down off the relays with their weight.
I've kept the stock headlamp feed wiring (18g?). Stock Halogens are it for now. Big H4's will need some bigger rewiring, but I expect a decent voltage increase with the relays, so they should be brighter as is. It's cool to hear the click on the firewall when I pull the switch.
The best thing about this conversion is any powersource fusible links can be left on and attached to the new powerpoint. All of the links are out in the open, not insulated.
Oh, I eliminated the Amp meter wiring. I have a good voltmeter and what's the point of sending all that current down into the dash?
I hope the gods of originality provide some good will. At least I'll be able to see at night now.
Headlight Relays. 1967 GM Fullsize
HD Power point with Alternator and Battery feed.
Dual 15a Little fuse fuse holders for H/Low beam power to relays
Small Red with the crappy blue lug is the new 12SI Alternator voltage sensing, can't solder onto a fusible link guys!
Side spade lugs; Black counter clockwise is a fusible link for body power and the clockwise is a straight 12g wire to PW breaker.
White to Orange fusible link is Alternator field to Ignition switched source.
Still need a short unfused link across to power the horn relay.
Black is horn button ground and green is to horns.
As far as the relay triggers and lamp feeds, I went back along into the harness just before the drivers side lamp split off. Opened the wrap, cut the LT Green high beam, and Tan low beam. Spliced in the triggers downstream and the lamp feeds on the upstream side of the cut. Grounds for the relays combine into one and are grounded on the driverside firewall ground post. Tidied up, wrapped everything in harness tape. Manipulated and routed as close to stock. The battery feed looks sad, see the big lump wrapped in tape? It's the main harness power splice weld with the old Alternator feed cut out and pulled down the harness.
The factory grounds need to be redone. They're crap. The fuse holders need some kind of strap or they'll likely virbrate the connectors down off the relays with their weight.
I've kept the stock headlamp feed wiring (18g?). Stock Halogens are it for now. Big H4's will need some bigger rewiring, but I expect a decent voltage increase with the relays, so they should be brighter as is. It's cool to hear the click on the firewall when I pull the switch.
The best thing about this conversion is any powersource fusible links can be left on and attached to the new powerpoint. All of the links are out in the open, not insulated.
Oh, I eliminated the Amp meter wiring. I have a good voltmeter and what's the point of sending all that current down into the dash?
I hope the gods of originality provide some good will. At least I'll be able to see at night now.