Coil hookup...again
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Junior User
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From: Oregon
Coil hookup...again
I've got an interesting dilemma here...the '72 F-100 that I was drivin around for a daily driver became a donor truck for the 390 in it to power my '69 F250 CS. the engine has been out of the '69 for quite some time now(darn money-permitting projects), and I seem to have misplaced a wire, can't find where I set it out of the way 
so, if anybody can remember off the top of their heads, whereabouts does the wire from the ignition to the coil come through the firewall on '69 pickups(assuming nobody got really ambitious and re-wired the entire firewall). BTW, I compared to the '72, and they're totally different, so I think I need a comparison to a closer year truck.
so, if anybody can remember off the top of their heads, whereabouts does the wire from the ignition to the coil come through the firewall on '69 pickups(assuming nobody got really ambitious and re-wired the entire firewall). BTW, I compared to the '72, and they're totally different, so I think I need a comparison to a closer year truck.
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Junior User
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From: Oregon
I know that would generally make sense, but when I hook up the one remaining wire in that harness, all I get is solenoid click. I have 2 starters, just tried both of 'em. Mine may be a special case or somethin, but I seem to remember having one wire that was with the oil pressure an coolant temp. that just ended. My '72 had the same thing, so I was under the impression that most of em were like this, though I couldn't for the life of me figure out why I'd have an open wire there. While we're at all this, does anybody know where a decent wiring diagram might be online, so I can't use my tired brain to excuse the fact that my truck ain't runnin? If I remember correctly, the tach wire goes to the distributor side of the coil? Also, electric chokes. Where should I wire that up to?
So close, yet so far, everything else is hooked up and ready except the wiring.
So close, yet so far, everything else is hooked up and ready except the wiring.
Lead Driver
Joined: Apr 2001
Posts: 6,175
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From: Texas
I believe it is a red wire (there may be a stripe as well), it should show +9 or so volts with the ignition on.
Make sure your wires are correct at the solenoid. The wire that goes to the "I" should be hot when the ignition is on. The other post should only be hot when trying to start. You probably knew this, but it might act funny if you had it backwards.
Next, make sure you have a good solenoid. Jump the battery positive to the "S" and see if it turns over.
Make sure your wires are correct at the solenoid. The wire that goes to the "I" should be hot when the ignition is on. The other post should only be hot when trying to start. You probably knew this, but it might act funny if you had it backwards.
Next, make sure you have a good solenoid. Jump the battery positive to the "S" and see if it turns over.
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Junior User
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From: Oregon
Gtex-
Thanks for the ideas, it helped me figure it out...you were right it's the wire clustered with the oil pressure an water temp. You ever have problems with your neutral safety switch? figures when you think it's an engine problem, the tranny's really playin tricks on ya.
Thanks again to ya Gtex, and Led
Thanks for the ideas, it helped me figure it out...you were right it's the wire clustered with the oil pressure an water temp. You ever have problems with your neutral safety switch? figures when you think it's an engine problem, the tranny's really playin tricks on ya.
Thanks again to ya Gtex, and Led
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