Factory Central Locking Motors At Rest, Toad RK30, 1998 Mitsubishi L300

How can I detemine whether my central locking motor legs are open or at ground when they are at rest?Shaun

Pull the door panel and test at the two actuator wires with your meter. Test for voltage first. If they don't have power, check for continuity to ground. That will tell you for sure. Also, search "1041" in the downloads section. It's an old tech tip that explains door lock systems.My ex once told me I have a perfect face for radio.

That was a great piece of advice.Ive now established that the legs rest at ground. Next is to establish whether the keyless entry module gives a positive pulse or a negative pulse,by using a test lamp.I'll update when I've done this. Most of the wiring diagrams show three or five wires at the switch on the dash.On mine there are just four.+ve in,-ve in,and twoswitched wires to the legs of the motors resting at ground.There are no relays,just direct wired, switch controlled. But are they Negative or positive trigger? How do I find out please?Shaun

Having established that the motor legs are at ground when at rest,I am now questioning whether I am correct. I removed the switch from the dash and disconnected the connector block. Should I have left the switch connected to the wires? The RKE module give a positive pulse and on the basis that the C/L system rests at ground I added two relays to convert both the lock and unlock outputs to negative trigger ,but nothing happens at all,now.Not sure where to go next. Your help is greatly appreciated....Shaun

It's best to leave the switch, so you can test all wires in all states (at rest, at unlock, at lock). What is the vehicle?My ex once told me I have a perfect face for radio.

Its a Mitsubishi L300 panel van.1998 Shaun

As far asci can make out I have the four wire reverse polarity locking system...Shaun

That's what I was thinking.My ex once told me I have a perfect face for radio.

I need to do some serious testing to establish whether the factory locking is +ve or-ve trigger.The output from the keyless entry module is +ve.Shaun

If both actuator legs rest at ground, then one leg on each actuator would need to be opened and 12 volts applied. Check the actuator wires and see which one gets power on lock and unlock. https://www.the12volt.com/relays/relaydiagram49.htmlMy ex once told me I have a perfect face for radio.