My driver side door lock plug is not working. I can unlock the driver and passenger side doors from the passenger side switch, so I know it isn't the door actuator. I have also put the passenger side switch that does work on the driver side plug and it still doesn't work. I also have two other lock switches, since I replaced my door handle assemblies, that I have tried on both the passenger and driver sides. They all work on the passenger side, but none work on the driver side. I do not know what to check next, it appears the problem is the plug forward into the harness I guess. Sorry if this has been asked before I searched on the forum and everywhere else, but I haven't found this particular issue. My car is a CL, but not as many people own them as the TL. The fix would be the same on either car.

 

Could it be the #40; left cylinder switch assembly on the link below?

Door Locks - 2003 Acura CL 2 Door SPORT KA 5AT (acurapartswarehouse.com)

Maybe spray some the connector down with electronic cleaner or check for 'bent' connector pins?

 

I figured it out, apparently you have to have all the plugs on that door plugged in for that switch to work. I just had the switch plugged in.