1991 accord ex, ultrastart u441

Hi, I am installing an ultrastart u441 in this , and every thing is great except the unlock will not work. I believe this lock/unlock works off the passenger circuit? because I can get it to lock, but not unlock with the remote. The same thing happens with the passenger door lock switch itself. I tried swapping switches but no go. Any ideas what the problem is? i think it is a bad oem relay or control module? Any input will be appreciated.jmacf14

Is there an unlock switch on the drivers door? Does it work?

yes it works at the drivers door, lock and unlock all doors with drivers door switch.jmacf14

https://www.the12volt.com/installbay/forum_posts.asp~TID~92918 Look at this and verify that you have the correct wires.

yep, those are the wires, they were in a 2wire plug at the bottom of a harness in the drivers kick panel.jmacf14

anyone ever come across this before? I know it is something wrong with the unlock circuit in his car, like maybe the control module or something. I am curious if there is a way to circumvent that, or pinpoint the issue, and have the owner repair it.jmacf14

Thanks, that's good to know. I heard from a co-worker just recently that those doorlock control modules do sometimes go bad. My neighbor has a '96-2000 style Civic (I don't know exactly what year), and her power doorlocks stopped working, both from the switch on the door, and from the remote start that she'd had installed a few years ago. It took a little bit of testing to get it all figured out, but it turned out that the ground wire for the doorlock module inside the door was dead. Probably the wire going through the door boot got broken. I grounded the module to another source, and it worked fine after that.