72 Ignition Switch Wiring
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72 Ignition Switch Wiring
I have a 1972 F-250 with an ignition switch that was by-passed with a push button switch. The push button switch was wired to the positive side (battery) of the start solenoid and to the "I" post on the solenoid.
The wires start to melt and burn so I don't believe this is correct. I have pulled the ignition switch and found the red and orange wires were combined leaving an unused post on the ignition switch. I believe the push button switch is in-correct and someone took the easy way out of replacing the ignition switch or tracking down a short. I need to know which posts the red and orange wires connect to or a copy of the wiring diagram. Can anyone help?
The wires start to melt and burn so I don't believe this is correct. I have pulled the ignition switch and found the red and orange wires were combined leaving an unused post on the ignition switch. I believe the push button switch is in-correct and someone took the easy way out of replacing the ignition switch or tracking down a short. I need to know which posts the red and orange wires connect to or a copy of the wiring diagram. Can anyone help?
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Joined: Jan 2008
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72 Ignition Switch Wiring
The mistake is the wire going to the I terminal.
The start circuit is the S terminal.
The I terminal allows 12 volts to the coil for starting, then it is by-passed so a lower voltage going to the coil to run the ignition.
My orange wire goes to the S terminal
So you need the diagram for the Ignition switch or starter relay?
The start circuit is the S terminal.
The I terminal allows 12 volts to the coil for starting, then it is by-passed so a lower voltage going to the coil to run the ignition.
My orange wire goes to the S terminal
So you need the diagram for the Ignition switch or starter relay?
New User
Joined: Jan 2008
Posts: 0
Likes: 24
72 Ignition Switch Wiring
The mistake is the wire going to the I terminal.
The start circuit is the S terminal.
The I terminal allows 12 volts to the coil for starting, then it is by-passed so a lower voltage going to the coil to run the ignition.
My red wire goes to the S terminal
The orange goes to the I
So you need the diagram for the Ignition switch or starter relay?
Here is a photo to see if it helps
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The start circuit is the S terminal.
The I terminal allows 12 volts to the coil for starting, then it is by-passed so a lower voltage going to the coil to run the ignition.
My red wire goes to the S terminal
The orange goes to the I
So you need the diagram for the Ignition switch or starter relay?
Here is a photo to see if it helps
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chesire17201
1973 - 1979 F-100 & Larger F-Series Trucks
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Jan 25, 2012 06:25 PM
