having trouble finding the lock/unlock wi

The essential info. 1990 Honda Accord LX Sedan, all stock and never had alarm installed. I have tested all of the wires that needed to be connected to the alarm. The only one I cannot confirm to be the lock and unlock with my multimeter. The connector as pictured below is the 2 pin gray plug wrap in blue tape together with the wire harness black loom. The wires in the plugs are BLACK/ red(unlock) and BLACK/ white(lock). To test it, I ground the black of my multimeter and put the red on the connector wire, one at a time. While the multimeter is connected, I flip and switch and looking for voltage drop to zero or close to it. Nothing really drop on either wire. At rest the constant voltage shows 5.16V, as I flip the switch in either direct, the voltage goes to 5.09V, but not even close to zero. I follow this video to do my testing. What I did to verify my testing method was to test the plug at the actual switch itself, the 2nd picture below. The wires are GREEN / WHITE, middle is black as ground, and GREEN/ red with 2 silver dots. I test both of the green wires and the voltages go from 5.16V to zero each time I flip the switch then back to 5.16V. Now that is how it's suppose to be tested and show those results. I wonder if the lock and unlock wires can be found else where with the same or different colors. I can google any thing to be different. Picture 1: 2 pin gray plug wrap in blue tape under the carpet. Picture 2: 3 pin plug right at the driver's door. Picture 3: The brown plug above has the BLACK/ white for door triggers and the green plug has the GREEN/ black for trunk trigger. Picture 4: Big wire harness above the fuse next to the ignition harness. Are the lock or unlock wires in this one? What colors are they? Definitely not the conventional colors. I don't know what else to proceed next? I can't completely install the alarm without confirming these 2 wires. I don't really want to go back later to connect the wires. Plus I am doing priority unlock so I want to get it done now. For priority unlock, thanks Howard: Which wire color in the door do I need to cut to isolate the front driver's door from the rest of the doors so I can connect to the relay? Also I am collecting ideas of how to run wires from the door inside the cabin on the driver's front side as I am putting window modules in the doors. The boots seem on tight and I don't want to drill any thing. Maybe I have to take the fender off. I have read the sticky thread on this forum of that wonderful proper way to run wires through the door but my door is different. Thanks.

To test for a Type B (-) lock wire, set the DMM to +20V DC.  Connect the Red lead to +12V constant and the Black lead to the

suspect wire.  When the lock (or unlock) is pulsed, you should see the DMM go to +12V.

Note from DEI :

The station wagon uses GREEN / WHITE for lock and yellow/white for unlock. These wires are found either in the drivers door harness

or under the rear seat.

Locate the large harness in the lower below the carpet in the drivers kick panel. Near the foot rest you will notice a piece of blue tape

attached to the harness itself. Reach around to the underside of the blue tape to locate a 2 pin gray plug with the lock and unlock wires

attached to the plug.

Power Lock           BLACK/ white  (-)      lower drivers kick 

Power Unlock        BLACK/ red   (-)        lower drivers kick

 

Looks like the top picture has the correct wires...

 

Soldering is fun!

You'll drive yourself mad using a DMM on a car of this age, go to a scrap yard and pick up a side light (10 watts) with the two leads, attach a clip to one side and ground it*, solder finish (tin) the other end, throw over the driver's door shut so the vehicle thinks all the doors are shut, make sure key isn't in the ignition, then feed the other end of the bulb wire to each in turn. If you've found the correct wire it will lock or unlock the vehicle then try the other wire. *Or of course use a Snap-On tester with an incandescent bulb, still my number one test and probe method for most cars.

I have't a clue which wire! Test, it sits on ground at rest, when you lock it will flash 12V+ for 0.8 secs. This is where my comment from above works, it's much easier to watch a momentary light flash than a meter! You keep saying "in the door" if the controller isn't in the door, then it's at the kick panel. It was a WHITE/ red on later models. If you find a wire that matches at the kickwell, cut it and try lock-unlock. If the driver's door doesn't work you've found the right wire without having to go into the door.

The control module is in the door so I guess wires would have to be ran. I have a 6V/12V test light, would it work the same as what you described above Howard? Thanks.

Yes if it's incandescent (filament) rather than say LED.