Re: Stumped on 48 V cart
So, I would assume the solenoid is new and In good working order. So you aren't getting signal power to the solenoid otherwise it would click and energize the coil that will hold the contactor closed. So working backward you should be able to find the issue. I don't have your schematic so I can't back trace that for you. Crash mentioned the micro switches, they are easy to test with power off, with tester the should test open and close when switched. You also mentioned diode which one, not sure it's it for the solenoid?
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