New harness question for electronic ignition upgrade
- Thread starter Sonny
- Start date
1967coronet440
Well-Known Member
Looks like it’s for the distributor?
Sonny
It’s all fun til the rabbit gets the gun.
Could be but the plug is at the firewall bulkhead connector and the starter relay.
Looks to me like it lands on the start relay...You need to consult your wiring diagram to be sure..where are the other ends of those wires? Lay the harness out in the engine bay if you have to and see where they want to go..
Nacho-RT74
Well-Known Member
for optional turning lights on hood or fender ? black yellow traced uses to be code for parking lights thought
Nacho is correct on the colors..that connector at the same point as the bulkhead connector is what's confusing to me, looks like it's made to plug into something right near the bulkhead on the firewall apparently.
Nacho-RT74
Well-Known Member
I don't know If I'm right, but just thinking out loud LOL.
Black traced yellow is the code for - lead of coil from ECU too LOL
Black traced yellow is the code for - lead of coil from ECU too LOL
Sonny
It’s all fun til the rabbit gets the gun.
So the question is is it OK to run the engine with this wire unplugged? They are wired together.
Nacho-RT74
Well-Known Member
ok... points cars gets the dist straight to - lead of coil.
If there is not other wire around to conect to - lead of coil from ECU, should be that one... so the car won't run without that plugged. But what thought M&H to reach the coil from that plug ?
that signal could be used to tachs thought!
If there is not other wire around to conect to - lead of coil from ECU, should be that one... so the car won't run without that plugged. But what thought M&H to reach the coil from that plug ?
that signal could be used to tachs thought!
Well then that sheds a little more light. Typically the wire from coil(-) goes straight to the ECU. So if you don't plug that connector in to anything, that's basically what you have...the plug is just a splice point..Beats me why they'd do it that way but they build them for a living, not me..
Nacho-RT74
Well-Known Member
next question is... so we know the black traced wire reachs the ECU plug... but the other one ?
Sonny
It’s all fun til the rabbit gets the gun.
Negative side of the coil.
Sonny
It’s all fun til the rabbit gets the gun.
so the car starts and runs fine. However, I still can’t get the alternator to charge the battery. I have replace both the alternator and the wire harness, so what else could be keeping the battery from being charged? My voltmeter on the battery says 12.3 with the engine running. It should be 14 point something correct ? Maybe it’s the bulkhead connector?
Nacho-RT74
Well-Known Member
Oh Ok, Dunno why I thought both wires got diff terminals into a two way plug!!!... so that is a single terminal with both wires spliced into... definitelly must be to plug a tach to the interior of the cabin.
with the new harness did you get also electronic regulator upgrade wiring and plug ?
how many prongs got yout alt, and how many wires got the harness ?
Sonny
It’s all fun til the rabbit gets the gun.
Thanks for asking. The new alternator has two poles on it a blue and a green which it had before. And the harness matches. New ECU, however I was using an old VR. I just swapped in an old VR I had laying around, and now I’m getting 13.9 V while running. Maybe I’ll just replace that with a new one as well. I think the ones I had were from the old points system.
BeepBeepRR
Well-Known Member
I think those are tach wires. They clip onto the factory harness that goes into the tach from under the dash.
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