1975 Ignition Control Module
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Joined: Oct 2006
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1975 Ignition Control Module
I have a 1975 F100 automatic with a 360. It has points and condensor in the distributer. I purchased the electronic ignition conversion that goes inside of the distributer. I was told on this forum that 1975 model trucks have the seven wire ignition control module and the wiring for my EI conversion is different. Well, my truck does not have the module. The wires and plugs are there, but, no module. Is it possible that the previous owner bypassed the module and it is no longer a factor when wiring my EI conversion.
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Post Fiend
Joined: Apr 2008
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From: Big Sky Country
The '75 is a one year only ICM (green grommet), as you stated it has 7 wires, on the replacement ICM's the 7th wire (blue) is deleted.
I haven't had success with the revised (6 wire) ICM's, i sourced a NOS Motorcraft ICM (7 wire) for my truck.
I haven't had success with the revised (6 wire) ICM's, i sourced a NOS Motorcraft ICM (7 wire) for my truck.
Ford Parts Specialist
Joined: Nov 2006
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From: Simi Valley, CA
DuraSpark Electronic Ignition introduced in 1974 FoMoCo vehicles, but not all came with it until 1976.
Most 1974/75 F100/350's with 360/390's did not come with DuraSpark.
The module used in 1974 is 1974 only / The module used in 1975 is 1975 only.
Modules ID by a colored plastic square above where the wires feed out.
1976 blue module also used in most 1977/79's, except some sold new in CA vehicles, use a POS red module and except some 1978/79's sold new in high altitudes, have a yellow module.
Blue module also used well into the 1990's.
Most 1974/75 F100/350's with 360/390's did not come with DuraSpark.
The module used in 1974 is 1974 only / The module used in 1975 is 1975 only.
Modules ID by a colored plastic square above where the wires feed out.
1976 blue module also used in most 1977/79's, except some sold new in CA vehicles, use a POS red module and except some 1978/79's sold new in high altitudes, have a yellow module.
Blue module also used well into the 1990's.
Senior User
Joined: May 2012
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If it's using points, then the EI module would have been eliminated from the system. As I mentioned to you yesterday, I have never installed a Petronix and stand to be corrected, but my assumption is that in your case you can approach the installation of the Petronix as if your system never had EI (that is, as a straightforward points to petronix conversion).
1st Gear
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From: Bathurst, New Brunswick
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