S13 Drivers Power Window Acting Funny

[S13Nissan240SX]

Hey all,
I'm having a problem with my drivers side window and I hope you can help me out. Sometimes this window will go up and down and sometimes it won't. When it works, it had no trouble. Therefore, I'm assuming that the motor and regulator are still good. I've taken the door panel off and I notice that when I notice that there is a wire harness going from my switch to some black box (about 1" x 1" x 4 "). When I manipulate the plug going into the box, I can usually get the window to go up and down. Therefore, I'm thinking that it's either the plug, the harness, or that black box. What confuses me, however, is that is that the passenger side window can always be controlled from the drivers side door and that utilizes the same harness, plug, and switch. Any thoughts? I'd appreciate any advice. Thank you much.

----Matt

[AKADriver]

The black box is a relay. Sounds like the relay is broken.

[mrdirty]

2nd the relay...just replaced mine and it fixed the same problem you describe.

Even if u unplug the relay from the harness the passenger side will still operate...

edit:
misread your post, that's exactly what will happen if the box goes.

[S13Nissan240SX]

Great, thanks for your help! I really appreciate it.:) :)

[S13Nissan240SX]

Great, thanks for your help! I really appreciate it.

[hybrid_eg]

guys sorry for waking this thread up from the dead, i have the same problem and its annoying the crap out of me.. when it works it works smooth, fast with no noises.. when it doesnt work although i'm pressing on the switch i can hear clicking inside the door panel.. dont know what gives if its the relay box or regulator.. from my understanding, regulator is a rail that makes it go up and down.. eitherway.. i'm hoping its just a relay so i can hopefully take one at pick a part hahaah..