How To Wire Relays For Power Door Locks

Get the new relay out of its package.

How to wire relays for power door locks. Power door locks function intermittently. Install the new door lock relay. I know enough about electrical wiring to efficiently burn the house to the ground. Door locks 5 wire alternating 12 volts positive type c relay wiring diagram.

Should you need to add relays for a 3 wire negative type b door lock system use the diagram below. If the relay and switch are working properly but you re not getting power and ground at the door lock actuator check the wiring harness in the hinge area of the door. Except at the switch in this case both motor legs rest at ground. The switch when moved in either direction applies both power and ground directly to motor legs without the use of any relays.

Find the door lock relay. The lock and unlock wires below refer to the switch wires not the motor legs. You tell us how you want to use your lock unlock switch as to whether you want it to throw power to the relays to lock and unlock the doors or have it to where they throw a ground. On the right side you have a single relay.

When you look in the fuse box you have three relays that work the power locks. That s where most wire breaks occur. Using a pair of needle nose pliers pull out the old relay. If your alarm or keyless entry has positive outputs only you will have to connect the other side of the coils to ground and connect your outputs as shown.

We can then help with specific wiring info. If the door lock relay has any internal or wiring issues it can cause the door locks to function intermittently. One of the first symptoms of a possible problem with the door lock relay are door locks that function intermittently. You can have your lock unlock switch either throwing power to the relays to activate them or throw a ground to them.

Locate the relay next to the cluster of different relays and solenoids. If the ground is good remove the door trim panel and check for power and ground coming into the power door lock actuator. Open the hood if it is not already open. Remove the old door lock relay.