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Even if you don't have a schematic, a photo of the circuit board would be useful. The component in the bottom left of the PCB is rotted right off. I don't know if it's supposed to be a diode like the two right above it, or a resistor.
Wonder how much of a difference is there between 70989-98C the next cruise control module. Perhaps one of those could be used if you cant get yours to work.
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Electrical schematic for '96 cruise control?
