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1984 Mustang keeps running after shut off

676 Views 2 Replies 2 Participants Last post by  jamesh23
Yep my 84 mustang 5.0 continues to run after I turn the key off and pull it out of the ignition, how do I fix this?
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That's called engine run on. This happens on older vehicles that has an external voltage regulator and it's due to a small amount of voltage going through the charging system to the charging lamp indicator. What you need is a 1a-100v diode installed into the circuit that prevents this connection.
That's called engine run on. This happens on older vehicles that has an external voltage regulator and it's due to a small amount of voltage going through the charging system to the charging lamp indicator. What you need is a 1a-100v diode installed into the circuit that prevents this connection.
how much is this part generally and how do I install it? thank you.
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