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Peter Cowan/Lexy Cameron wrote:
Connecting the output of the new solonoid directly to the cable going into the starter has fixed the run on problem (no power at either of the large terminals now). The problem must be due to power in the contactor getting to the windings of the solonoid. I'd thought these were totally separate circuits and don't understand what would have caused this.
Peter
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Well, I'll take a shot at a possible solution to the mystery. It is very common on starter solenoids to have +12V connected internally to one side of the coil, even is it has an external terminal for that connection also. In a case like this, it is customary to activate the solenoid by grounding the other small coil terminal to activate the solenoid and starter, and disconnect it to deactivate. Not knowing the particulars of your solenoid, I can't say is this is the case for the one you have but it may give you another thought to pursue.
Regards,
Steve
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