Door locks single pulse to lock and unlock negative pulse relay wiring diagram.
Power door memory lock relay circuit short to ground.
By bat team last updated 2016 07 14 a site with free advice from mechanics.
Power door memory lock relay circuit short to ground.
The system uses voltage reversal to control the direction of the door lock actuators.
Learn what power door memory lock relay circuit short to battery means location and how to repair.
Apply voltage to one wire of the motor and ground to the other and the motor moves in one direction.
The door lock circuit in the diagram above uses ground side switching negative pulse control containing two spdt single pole dual throw relays.
The fault could be a short to ground in the battery positive voltage circuit however a short to ground in the power mirror motor control or the memory seat control circuits could also be the cause if the fuse opens after any of the switches are activated.
If the power door lock relay fails it will cut off power to the entire power door lock system and may cause them to not function correctly.
If the mir lock fuse is open all systems on the fuse would be inoperative.
Using a mechanical latching relay like the pcb latching relay pictured here you can use a single negative output to alternately lock and unlock the doors the mechanical latching relay only requires it s coil to be momentarily energized to change and maintain the opening or closing of it s contacts.
Direct battery power through the pwr acc circuit breaker c b supplies the unlocking and locking power to the motors in the doors since the relays are clicking you can be pretty sure the ground and power circuits for the first circuit are working just fine.
The bcm sets the obdii code when the power door memory lock relay is not to.
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Reverse the polarity and the motor moves in the opposite direction.
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The ctsy lid fuse makes the relay click energizes the coil.
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The mir lock fuse supplies battery positive voltage for the power mirrors power door lock switches and the memory seat switch if equipped.
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The body control module bcm monitors the power door memory lock relay.
