Johnny2by4 Posted July 31, 2015 Share Posted July 31, 2015 Hello to all. I have 1994 LS400 and for some reason my front passenger window will roll down but not up. It will rarely move an inch as if the motor/regulator is going out so i ended up buying a new motor/regulator. I installed it and i had the same problem. I dont think its the switch because my master switch nor my passenger switch will completely roll up the window. Im beginning to think i have some wiring issues somewhere. Has anyone experienced this same or similar issue that can help? By the way the only window that works without any issue is the driver side. Quote Link to comment Share on other sites More sharing options...
sha4000 Posted July 31, 2015 Share Posted July 31, 2015 How do the connectors look? Is there any corrosion on them? Do the other windows besides the driver window do the same thing? Have you checked the window rails to see if they need to be lubed? Lots of times it's the master switch that has built up some corrosion. Try lubing the rails first though. Quote Link to comment Share on other sites More sharing options...
billydpowell Posted July 31, 2015 Share Posted July 31, 2015 first pull the door panel off and watch the window movement when you try to raise it, see if it gets in a bind and maybe try to help it with your hand to see if it encountering any resistance. if not you probably have wiring/switch problems, oxidation happens.... Quote Link to comment Share on other sites More sharing options...
Exhaustgases Posted July 31, 2015 Share Posted July 31, 2015 At the motor connect a volt meter and when you switch it up look at what the meter says. If it is under the supply voltage there is a bad contact someplace. Quote Link to comment Share on other sites More sharing options...
Johnny2by4 Posted August 2, 2015 Author Share Posted August 2, 2015 I appreciate the help everyone. :) I did clean the connectors on the master switch and passenger switch with some CRC electronics cleaner but its still not working. The right rear passenger window wont go up or down at all. The left rear passenger window used to go up and down but it started to not go up so i dont use it anymore. I am going to use a volt meter to test the wires and see if i can sniff out the problem. I also took the motor and regulator apart to see if the gear in the motor would spin on its own but it would only spin in one direction not both. Does anyone know where the wiring goes to from the connector on the door into the car? I guess a wiring diagram would be my best bet? Quote Link to comment Share on other sites More sharing options...
billydpowell Posted August 2, 2015 Share Posted August 2, 2015 sometimes a spray is not enough, if you can get inside and scratch the surface to break the oxidation, maybe you can cure the problem on your LR did you use the master switch or the LR door switch?? just wondering.. Quote Link to comment Share on other sites More sharing options...
Johnny2by4 Posted August 2, 2015 Author Share Posted August 2, 2015 Yeah Im thinking its oxidation. I used the master switch. Do you know where the wiring from the door leads to inside the car? does the wiring go underneath the carpet or floor panel? I see the black tube holding the wires in between the door when it's open. Sorry for all the questions.. Quote Link to comment Share on other sites More sharing options...
billydpowell Posted August 3, 2015 Share Posted August 3, 2015 no wiring # for 94, just start searching like all of us had to do at one time... you'll be surprised what you will find.. good luck. Quote Link to comment Share on other sites More sharing options...
sha4000 Posted August 4, 2015 Share Posted August 4, 2015 The harness goes underneath the carpet below the glove compartment. Quote Link to comment Share on other sites More sharing options...
FiatLex Posted August 4, 2015 Share Posted August 4, 2015 This is free: hold the switch in the direction you want to go and count to 60. Try it both at the door and at the driver's door. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.