Coil question
Senior User
Joined: Apr 2013
Posts: 317
Likes: 1
From: SF Bay Area
I would say no. The 80' should have been electronic ignition, so it ran a full 12 volts. Non-electronic used a resistor to drop to 7 volts to save the points from burning up.
Its possible it might work, but it would be very weak.
Its possible it might work, but it would be very weak.
Cranky Old Guy
Joined: Mar 2008
Posts: 3,562
Likes: 6
From: Raphine, Virginia
Ford used the Duraspark II from 77-84. Ignition coil had the resistive wire still wired inline from the run side of ignition switch. So yes, it will work. Difference being the coil used a horseshoe style connector instead of regular posts.
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
Interesting, what are the primary and secondary figures as measured? I bet the secondary has some shorted turns. Check plug wires carefully for proper resistance or replace, don't want to roast replacement coil.
Post Fiend
Joined: Jun 2003
Posts: 8,209
Likes: 12
From: Black Hills of SD
Exactly. High secondary resistance is the most likely cause of coil failure, though not the only one.
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Posting Guru
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From: abilene kansas
Plug wires,cap,rotor points and condenser are all new
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Post Fiend
Joined: Jun 2003
Posts: 8,209
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From: Black Hills of SD
Yes but the damage was probably done before.
On these old trucks, it's a good idea to check the resistor wire from the switch. Many times it's been scabbed into or butchered. You can still get new ones. I got one a couple years ago from NAPA for my roadster because I hate those problematic porcelain ones and wanted to keep my original 1963 coil.
On these old trucks, it's a good idea to check the resistor wire from the switch. Many times it's been scabbed into or butchered. You can still get new ones. I got one a couple years ago from NAPA for my roadster because I hate those problematic porcelain ones and wanted to keep my original 1963 coil.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
B6A-12029-B .. Ignition Coil (Motorcraft DG-5).
All 1956/73 & 1974/75 I-6 & V8 without DuraSpark electronic ignition.
1974's with DuraSpark use a different coil, same coil used on 1975 F100/350 before serial number W00,001: D5PZ-12029-A (Motorcraft DG-313-A).
1975 F100/350 from serial number W00,001, 1976/87 all use a different coil: D5AZ-12029-A (Motorcraft DG-314).
All 1956/73 & 1974/75 I-6 & V8 without DuraSpark electronic ignition.
1974's with DuraSpark use a different coil, same coil used on 1975 F100/350 before serial number W00,001: D5PZ-12029-A (Motorcraft DG-313-A).
1975 F100/350 from serial number W00,001, 1976/87 all use a different coil: D5AZ-12029-A (Motorcraft DG-314).
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