will a truck start without

[fordman]

the alt or reglator wiring? but everything else hooked up

[flyboy2610]

Yes.

[fordman]

thats what i figured. i still have a problem though. i think it may be the ignition switch. because everything in the cab is dead.

[fordman]

ok let me revise what is going on here. i do not have the alternator wirign hookup to the harness. i cant find it. the wiper switch is disconnected from the power and washer pump wire. the heater wire is supposed to be wired into the wiper switch so it has no power either. the headlights aren't hooked up either to the bulbs. butt he switch is hooked up. the brake light switch under the truck isnt connected. i dont have the correct wire to hook it up. if you jump the fender realy the enigne will turn over. if you try to start the truck with the key you get nothing. also the entire steering column is unhooked as well as ia forgot to hook up the brake light switch again. so all of this leads me to think the ignition switch is bad.
both the wiring harness and switch are used and from two different trucks. i dont think either was tested before i go them but the harness loks great. as well as i think the switch was probably good. but yo unever knwo for sure about the insides of it. i am thinking abotu buying a new switch. but i dotn want to waste the money if it isnt the switch. with the systems i still have unhooked should the key start the switch. this is a 1967 F100. it ran before the harness was swapped out. but it is not the same ignition switch that i have in there now.

[tanusfarms]

just the other day when I fried my ignotion switch i didn't lose the whole cab I just lost the switch so now i have to hot wire the truck till I get the money for a new switch. losin the whole cab sound like a fuse or a wire issue to me.

[tanusfarms]

its easy enough to test the switch just either pul the switch out and use a multi meter to test for continuity between the correct terminals when the key is in the kight spot. when the key is in start you should have continuity between 3 of the terminals. the other option is in my opinion the easiest just unplug the harness from the ignition and hotmwire the truck. if it starts your switch is bad if it doesn't the you have something else wrong assuming you hotwired it correctly.

[Thunderfoot]

Depends on the wiring harness... If you only have the 2 single 4 wire plugs it will not have any power to the cab as the main wire gets its power from the alternator harness, if you have the 2 single 4 wire plugs + a 2 wire plug then the power wire to the cab is not in the alternator wiring harness so it would have power to the cab.

Roughly, look at these 2 diagrams at wire 37 and you will see what I'm talking about...
http://www.fordification.com/tech/wirin ... ging03.jpg
http://www.fordification.com/tech/wirin ... rging2.jpg

My 69's with full gauges doesn't have any power without the alternator harness plugged in...

[fordman]

the plug at the end of the haress to plug the alt harness in is a single 4 plug connector. it is a 67 harness. with full gauges. but i think the 67-69 alt harness is the same. i think. for my application.

[fordman]

i would post a link to the 67 alt wiring but there actually inst one for gauges. the only one shown is for dummy lights.

[Thunderfoot]

the plug at the end of the haress to plug the alt harness in is a single 4 plug connector. it is a 67 harness. with full gauges. but i think the 67-69 alt harness is the same. i think. for my application.

Yes, should be... look for the Big Black/yellow striped wire on the connector for the alternator harness, if it is there that is the one that needs to be connected to the battery to get power to the cab.

[fordman]

yes that is the wire to the ignition swithc i seen that today when i was looking at the back of the switch. i will unwrap the tape and find that wire and hook it up to the battery side of the realy. that is what i needed to know for now thanks.

[fordman]

ok here is a actual picture of what ihave in the truck and the connector. i can run a jumper wire to get the truck to run. but now i need to know how this is suppose to be wired up. i found my old harness. and the alt wire is integrated into the main inner fender harness. so i have to rig up a way to plug it into my harness unless i can find the correct harness to plug into this plug. the wire colors are black with yellow stripe. power
yellow with blue/green stripe. horn
yellow. ?
green with red stripe. ?

the only diagram i can find that has the four wire plug like this one is for the 1970 F350 trucks. with gauges. is this diagram how i am suppose to hook up mine?
http://www.fordification.com/tech/wirin ... master.jpg

mine is a 67 F100 the wiring harness came from a 67 camper special. i dont know if it was a F100 250 or 350. it looks like it may have been a F100 from the picture. http://s38.photobucket.com/albums/e104/ ... kHalf1.jpg
http://s38.photobucket.com/albums/e104/ ... 300357.jpg
http://s38.photobucket.com/albums/e104/ ... 300365.jpg
the raditor is a clue that it probably isnt a F350. http://s38.photobucket.com/albums/e104/ ... 300360.jpg
link to tough old fords photbucket account and all other pcitures of this truck. http://s38.photobucket.com/albums/e104/ ... s%20Truck/

1 fianl comment. my old harness loks liek it may have been soem sort of older replacement harness from a aftermarket company. so it cant be used with my new harness from the firewall to the headlights and alternator. the whole harness is one piece from cab to headlights.

[fordman]

ok wait. this may be the diagram i shoul dbe lookign at i think. this is for gauges and doesnt shoe the horn wire is why thought it was different than what ihave. so is this how i should make my harness fit the other harness i had already? http://www.fordification.com/tech/wirin ... gauges.jpg

[tanusfarms]

i personally find this one more helpfull to me

http://www.fordification.com/forum/view ... =8&t=50804

states green with red tracer is circut 904, coil terminal of ignition swithch altenator regulator, 18 gauge wire,

my truck has so many different years and styles on it that I find it easyier to track it by what goes where And ocassionally I can go by color but not all my wires are the same color all the way. I hope to change that as time goes by.

[fordman]

i am really lost on this right now. my old harness is basically all red wires. what a pain in the. well anyway i took all of the tape off of the alt harness last night. i removed the start relay wires from the wrapping. i dont need those. i now haev three wires for the alt hookup. i need to add the horn wire before i wrap it back up. however the wires seem to run wrong. i need to post soem pictures of how they run so i can make sure they run right. once i get a confirmation on that. i need to figure out how to plug it in to my harness. with out cutting the original plug from my new harness. i do have aplug that came from the tail light plug at the firewall. but the wires are too small to use in the alt system. they could burn up if used.