In this case both motor legs of the door locks are normally open.
Reverse polarity door locks.
1 remove the door lock switch on the driver s side of the vehicle to reveal the switch wires.
The switch when moved in either direction applies both power and ground directly to them without the use of any relays.
All wires at the doorlock switch rest at ground with the exception of the 12 volt supply wire.
But worry no more.
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 doors.
Door locks actuators reverse polarity positive switch trigger type d relay wiring diagram.
Reverse polarity door locks vacuum type door locks mercedes vacuum door locks toyota child safety locks.
4 wire reversal door locks.
In this video i break down what needs to be done and how the circu.
They neither rest at ground or 12v.
Reverse polarity door locks this doorlock system has the factory doorlock switches wired directly to the motors in the doors.
If the unit continues to appear dead it must be electrically checked with an ammeter.
If there are three wires proceed to step 2.
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Be sure the lock is being powered by a dc source and that polarity is correct red to positive dc black to negative dc.
To the coil of the respective relay.
If there are four or more wires make the connections shown in diagram 4 for reverse polarity.
Adding a keyless entry or alarm system on your ride can be a real pain.
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Both motor legs rest at ground at the relays.
Rather than replace the locking knob with a closet knob simply reverse the doorknob placing the lock on the outside so little fingers can t lock themselves in where they do not belong.
To lock or unlock the vehicle polarity is changed on one motor leg via a positive pulse from a switch alarm keyless entry etc.