Powermax electric lift
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Use your electrical tester to go thru the wiring and find a wire that gives you 12v when the key is on, then no power when the key is off. This way you cant run the lift or winch unless the key is on and preferably when the engine is running as they do zap a lot of power from your battery. Usually behind the key switch there are some empty plugs or wires that don't go to anything (for future accessories) that you can check for ignition on and off. Your lift wont work unless it senses 12v power.