How To Test For 5 Wire Door Locks

Door locks 5 wire alternating 12 volts positive type c.

How to test for 5 wire door locks. The switch when moved in either direction applies both power and ground directly to motor legs without the use of any relays. Single wire door lock systems type f type g type h there may be one two or three wires in the harness not counting the illumination wire s if any and only changes in voltage and or resistance on one wire to lock and unlock. While the switch is off both wires lock and unlock are grounded. Step 2 activate the power lock switch to its lock and unlock positions while listening for a distinctive click sound coming from the relay.

How to wire automotive spdt relays. Check the fuses and circuit breakers especially if none of the power door locks work. If you cannot hear the click go to the next step. Except at the switch in this case both motor legs rest at ground.