coil wire colors for 1974 for pickup
Elder User
Joined: Aug 2004
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Trucks equipped with factory radios had these hooked to either the coil or the voltage regulator or both.
To the original poster, do you have the ability to take a picture you could post? If you can take the picture and just aren't sure how to post it, just e-mail it to me and I will post it for you.
Postmaster
Joined: Oct 2005
Posts: 3,083
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From: Victoria , BC
Hey I got a question on this diagram. The wire that goes to the starter solenoid for the "I" side what color is that one? on my truk a 73 theres 2 of the press on wires for there and they both give power when key is cranked. I'm having issues with my electronic ignition conversion for startup right now and i dont have the wire hooked up to that "I" side but there is a loose press on wire not being used. I'm borrowing another points distributor from a buddy tonite to just get this truck running and I will have to find the original points lower voltage wire to hook it up which sounds like a red/green stripe wire. I wonder if this has anything to do with why my ignition doesnt fire on my crane electronic ignition. I do run a new wire from my aux fuse box for a full 12 volts as needed for my app so i never used the points wire...
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
To your point though, my '73 Galaxie has a filter capacitor at the regulator - I can't imagine that they wouldn't carry over the same benefit to same-era trucks. Is there at least an open connector at your regulator? It's possible yours was removed.
If it looks anything like the picture below, it's a resistor - Mopar ballasts are often white and sometimes are used in a Ford swap. The filter capacitor is a small metal can, just like the condensor in a points style distributor (they're the same thing, in fact the term "condensor" is an ancient term for capacitor).
Elder User
Joined: Aug 2004
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To be perfectly honest I haven't looked at it terribly close. However, the wiring harness on my truck in that area was pretty chewed up and crappy and I got one from another member here that was in great shape. I do not recall seeing one when I swapped the harness. Unless it's buried down in the tape somewhere, I really don't think it has one.
You would think something like that would be on the wiring diagram wouldn't it?
Just looked and it does show on the wiring drawing. Next time it's above freezing out I'll go out and take a look. Labeled plain as day "noise suppression capacitor" on the yellow wire off of the regulator and tied to ground.
FWIW I don't get any engine noise on my old AM radio.
You would think something like that would be on the wiring diagram wouldn't it?
Just looked and it does show on the wiring drawing. Next time it's above freezing out I'll go out and take a look. Labeled plain as day "noise suppression capacitor" on the yellow wire off of the regulator and tied to ground.
FWIW I don't get any engine noise on my old AM radio.
Elder User
Joined: Aug 2004
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Just went out and looked and sure enough my truck does have the second yellow wire connected to ground. On this wire it has a slightly larger black un-flexible section. I'm guessing that is the noise suppression capacitor, just doesn't look like what I figured.
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