Reverse Polarity Door Lock System

When the doorlock switch is activated one of the circuits is opened and 12 volts is sent to the motor to lock or unlock the.

Reverse polarity door lock system. Determining the door lock system type 1 remove the door lock switch on the driver s side of the vehicle to reveal the switch wires. If there are four or more wires make the connections shown in diagram 4 for reverse polarity. Found mostly on mercedes benz vehicles the movement of the door lock actuators is controlled by a central vacuum pump. Both motor legs rest at ground at the relays.

The switch changes polarity on a single wire that may rest at power or ground depending on the state of the door locks. All wires at the doorlock switch rest at ground with the exception of the 12 volt supply wire. Reverse polarity door locks this doorlock system has the factory doorlock switches wired directly to the motors in the doors. To lock or unlock the vehicle polarity is changed on one motor leg via a positive pulse from a switch alarm keyless entry etc.

Door locks actuators reverse polarity positive switch trigger type d relay wiring diagram. To the coil of the respective relay. If there are three wires proceed to step 2.