Quote:
Originally Posted by Billy-O
I think you have a bad wire or connector between switch and the solenoid pin. With blue wire disconnected from solenoid, your meter reads 12v, but as soon as you connect you get 7v. I'm running on theory that you have good reading with wire disconnected because you have no load on it other than the meter. Did you try a temporary wire from brake switch to solenoid pin?
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I agree with Billy-O: poor connection, high resistance, loose wire, what ever you want to call it, it shows up when you try to flow current through to your solenoid. Full voltage unloaded circuit, low voltage loaded is the classic symptom.
It may take some detective work to locate. It might be a switch, a connector, even in a wire itself.
I agree with the temporary wire to the solenoid. If that works, it is proved beyond doubt.