How To Test For 5 Wire Door Locks

How to wire automotive spdt relays.

How to test for 5 wire door locks.

Check the fuses and circuit breakers especially if none of the power door locks work. While the switch is off both wires lock and unlock are grounded. 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. Door locks 5 wire alternating 12 volts positive type c.

Some of these will open a circuit to lock and ground a wire to unlock. 5 wire door locks are a bit more complicated. Step 2 activate the power lock switch to its lock and unlock positions while listening for a distinctive click sound coming from the relay. The switch when moved in either direction applies both power and ground directly to motor legs without the use of any relays.