How to Replace an Ignition Switch
Car Ignition Switch Replacement Safety Tip: Always wear safety glasses when working on your vehicle. Wear other personal protective equipment (PPE) when necessary, for example latex gloves or closed toe shoes. 1 Locate your battery. 2 Touch the ground side probe of the DMM to the negative battery post and the power side probe of the DMM to the positive battery post with the vehicle running. 3 Locate your ignition switch. 4 Gain access to the wiring behind the ignition switch. 5 Touch the ground side probe of the DMM to a good known ground (such as an unpainted screw to the body frame or door hinge bolt). 6 Back probe the power side probe of the DMM to the wire that connects the ignition switch to the fuse in the START position. 7 Read the current voltage reading on the DMM. You should have full battery voltage running through the ignition switch at this time. A significant drop (a reading such as 10 Volts or lower) would indicate high resi...