Join Date: Jan 2018
Location: Bonners Ferry, ID
I was looking at the wiring diagram for my 855D which shouldn't be much different than your HPX for the stuff you're talking about. The Lift switch is low current which applies voltage to relays which are unswitched high current. You didn't mention if the lift actually operates. If it does, you might want to check your battery and alternator health. A sudden high current load might pull the voltage on the fuel shut off solenoid too low and that will kill the engine. To get an idea, have your headlights running and try the lift. If the lights dim significantly, that should be a good hint. If you are not blowing a fuse, then it likely isn't an overcurrent issue.