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Something is not right here. There shouldn't be an ISC, it should be an IAC on a 1990, and there shouldn't be " a wire," there should be a two-wire hardshell connector that just plugs into the IAC valve. Did you have a connector come apart or something? The circuit is simple. It has a two wire connector that plugs into the IAC, and the two circuits run all the way back to the big 60 pin connector at the PCM.

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โˆ™ 2006-04-27 15:42:19
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Q: Where does the wire from the ISC switch hook up on a 1990 Crown Victoria 5.0 Liter?
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