You'll need the ignition wiring diagram for your specific vehicle. Disconnect the electrical connector for the ignition switch, then you'll need to identify which wires are which. Once you've got that you have to jumper the wire with battery voltage (12v) to the wire for the run position. Once those two have been connected, momentarily jumper the 12v wire to the "start" wire this will cause the vehicle to crank and start up. Once it starts remove that second jumper. Leave the 12v connected to the run wire, remove it to shut it down.
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You'll need the ignition wiring diagram for your specific vehicle. Disconnect the electrical connector for the ignition switch, then you'll need to identify which wires are which. Once you've got that you have to jumper the wire with battery voltage (12v) to the wire for the run position. Once those two have been connected, momentarily jumper the 12v wire to the "start" wire this will cause the vehicle to crank and start up. Once it starts remove that second jumper. Leave the 12v connected to the run wire, remove it to shut it down.