Duraspark ignition box
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3rd Gear
Joined: Jun 2022
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Duraspark ignition box
hey guys
On my 1980 F350 custom dually dump bed, the protective goo has all leaked out of the ignition box on the fender. Previous owner apparently changed out motor from 351 to 351 modified (6.6L 400). Truck starts and runs fine. I have a new module but don't want to install and have same thing happen. Couldn't find any burnt wires or bad grounds, but lots of stuff has been cut off or spliced. Dash and turn signal dash lights don't work and there is no horn. Several fuses had wrong amperage in them, most 15 amps had 25 or 30 amp fuses, so maybe some previous electrical gremlins. I'm considering a complete rewire this winter to a quickwire set or similar.
The wiring diagram I have in my Haynes book is about the size of a small envelop so I can't follow it.
Any advice, similar experience, or especially a larger version of the wiring diagram would be greatly appreciated!
Also if you have a horn and a dash console that would be spectacular!
On my 1980 F350 custom dually dump bed, the protective goo has all leaked out of the ignition box on the fender. Previous owner apparently changed out motor from 351 to 351 modified (6.6L 400). Truck starts and runs fine. I have a new module but don't want to install and have same thing happen. Couldn't find any burnt wires or bad grounds, but lots of stuff has been cut off or spliced. Dash and turn signal dash lights don't work and there is no horn. Several fuses had wrong amperage in them, most 15 amps had 25 or 30 amp fuses, so maybe some previous electrical gremlins. I'm considering a complete rewire this winter to a quickwire set or similar.
The wiring diagram I have in my Haynes book is about the size of a small envelop so I can't follow it.
Any advice, similar experience, or especially a larger version of the wiring diagram would be greatly appreciated!
Also if you have a horn and a dash console that would be spectacular!
Moderator
Joined: Jan 2001
Posts: 56,980
Likes: 2,735
From: Virginia
Here's a 1981 diagram. Most of it is the same, but there are a few differences. One being in 1980, they ran the marker lights off the same power as the headlight power. In 1981 and later they separated the power, the headlights have their own power going to the headlight switch as before (unfused, directly from a fusible link under the hood) but they separated the marker light power and ran it through it''s own fuse in the fuse box and then ran this fused power to the headlight switch. The headlight switch has several power sources going to it.
There is a little difference in the cluster wiring also in 1980. You will find in 1980, they wired things much like they did in 1979. If you are serious about the wiring, you should see if you can find a EVTM manual off ebay for a 1980. If you are going to use one of those aftermarket universal wiring kits, then don't bother buying the Ford diagram, nothing will be the same after you do that.
https://www.garysgaragemahal.com/1981-evtm.html
There is a little difference in the cluster wiring also in 1980. You will find in 1980, they wired things much like they did in 1979. If you are serious about the wiring, you should see if you can find a EVTM manual off ebay for a 1980. If you are going to use one of those aftermarket universal wiring kits, then don't bother buying the Ford diagram, nothing will be the same after you do that.
https://www.garysgaragemahal.com/1981-evtm.html
Lead Driver
Joined: Jul 2017
Posts: 9,591
Likes: 1,171
From: San Jose, CA
Being a dually I have to assume it's a 2wd truck, but perhaps the Windsor was available in 2-wheel drive trucks in '80.
I never remember all the ins-and-outs of what came with what. Hence my next question...
What is the engine code in the VIN? That will tell you for sure what it was built with in case it comes up as important.
The ignition module probably does not care though, so it might all be of no consequence. But still good to know.
Does the ignition coil look original? It might be that someone changed to a coil with a different ohm rating and it's contributing to overheating the ignition module. Or perhaps it was just that particular module's time to die. We've seen it a lot over the years, but not sure if anyone has really come up with a definitive answer on what causes it in each case.
Good luck.
Paul
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