1983 Mustang Ignition problem. Ballast Resistor? - Ford Mustang Forum

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post #1 of 3 (permalink) Old 10-10-2008 Thread Starter
Wook660's Avatar
Joined: Mar 2008
Location: Port Saint Lucie
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1983 Mustang Ignition problem. Ballast Resistor?

I have an '83 5.0 that I've just done a lot of work on. Then engine was pulled to clean up the engine and bay area, A new carb and exhaust was installed and all the old emissions equipment removed.

Problem: It fires right up but cuts out when the key is released from the start position to the run position. I have a wiring problem, I know. Now I disconnected the red/blue wire at the ignition module and hooked it up to a known good 12+ source when the key is on. It fired right up and ran great.

Question: I'm assuming I have a ballast resistor and it went bad. I haven't been able to locate it and wanted to know if I continue to bypass it if I will burn up the Coil or Distributer. If there is one, what is the ohm rating, I'll just splice it in where I've jumped the ignition module. Better yet, is the ballast right in front of me and I'm missing it? Thanks a lot!

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post #2 of 3 (permalink) Old 10-10-2008
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If you continue to bypass it, it's possible damage to the coil, ignition module and charging system.

I believe it's a 1.3 Ohm.

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post #3 of 3 (permalink) Old 10-10-2008 Thread Starter
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That's exactly what I want to avoid. Looking at my wiring diagrams, it appears the ignition module goes directly to 12+ and only the coil uses the ballast. If this is the case, I should be alright because the only thing I've had to rewire was the ignition module. I should be able to pull the wire connector of the coil and put the key in the run position and check for any resistance, right? If there is some it should be safe to say the ballast is still okay.
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