Need to know where the ground for the power window circuit is.
I have a 1991 LeSabre, and I cannot find a copy of the electrical service manual. My power windows work but are SUPER slow. I replaced the motors last year but it did not cure the issue. If I could find the LOCATION of the ground for that system I could check/clean/fix it, possibly making the windows usable. Rear windows are slow when controlled from drivers door, but are normal when controlled from their own switch. Haynes manuals are too genaric, cannot figure out.
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I would think you have ground problem , all these systems must share a common ground point , body ground . Probably behind the instrument panel or one of the right or left kick panels . You could test if you knew how to do a voltage drop testing . The easiest to get at would be a door switch , with a volt meter test power and ground while trying to open window or door lock . I will post a video off of youtube on voltage drop testing , the two guy's giving the training are service professionals . and teachers . Copy of Voltage Drop Essentials TST Motor Age Electric Testing Techniques You Need to Know
Could be a ground problem . Do you know power ? B+ voltage circuits an ground ? You would need to look at a wiring diagram an a power an ground distribution diagram to see if these two thing's have anything in common . Free wiring diagrams at http://bbbind.com/free_tsb.html . Videos on you tube on basic automotive electrical trouble shooting , plus voltage drop testing . Doing some basic electrical circuit test's is the way to find electrical problems . Then again it could be two different problems , power window problems can be caused by broken wires in the rubber boot from the body to the driver door main switch. Could be any number of thing's causing these two problems . Unless you have good knowledge of electrical trouble shooting an reading wiring diagrams , this could be something best left to a professional tech .
You would need to test the electrical circuit to find out what this could be . Videos on youtube for basic electrical trouble shooting !
Are all the power windows inoperative?
YES - Go to Step 3
NO - Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
Disconnect the driver window switch C2 harness connector.
Turn ON the ignition, with the engine OFF.
Probe the power window switch voltage supply circuit of the harness connector with a test lamp that is connected to ground.
None of the windows work ? You say fuses are good , which fuses ? Did you pull them all out an look at them ? Did you check for power - battery voltage at the window switches ? There is a driver door module involved !
Power Windows Completely Inoperative
Supply open or shorted.
Window regulator control switch inoperative.
Circuits open or shorted.
Window regulator electric drive inoperative.
Driver door module.
PERFORM driver door module self test. Service DTCs. If no DTCs are retrieved, GO to Pinpoint Test C .
Have the problem system checked for proper ground. It may be at the fuse box if it got wet. Electricity and water mean corrosion when there are two metals present - usually copper and iron. When electrical boxes or connections get 'warm' it means that there is added resistance in the circuit causing the heat. (like a light bulb without the light)
Do you know anything about automotive electrical system's ? How to use a wiring diagram an a DVOM - digital volt ohm meter to test electrical circuit's ? Looking at wiring diagrams to see if these systems share a common ground point or power supply would be the place to start . Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info year , make , model . Under system click on body & accessories ,then under subsystem click on power windows . click the search button then the blue link . looking at the diagram i see a 30 amp circuit breaker powers the windows , wouldn't think that to be the problem . Check out the ground # at the bottom right . G-103 or 105 . Check some of the thing's not working . Go back to the first part an click on HVAC under system . Check the blower motor circuit . This has a different ground . probably not that ! Checking the instrument panel electrical harness an connector's . Go to electrical distribution under system , then under subsystem click on power distribution . Look an see where all these system fuse get power from , a main fuse , ignition switch or a relay etc.... Check to see if B+ voltage is at the power window circuit breaker when not working . If not , problem is up stream from there . Watch these video's Electric Testing Techniques You Need to Know Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia
Testing the electrical circuit's is the way to find the problem . Hope i explained this good enough . Good luck & god bless
If the lock is trying to move, like you hear it but nothing really happens, replace the door lock actuator. i believe the windows are on the same fuse. Try removing the interior door trim and tap on the window motor lightly with a small hammer while holding the switch. If the window moves, replace the motor. If not, check for power and ground at the connector. If you have power and ground (which switch when going up then down) then replace the motor. If you dont, repair the circuit.
Which is it ? 93 or 97 Internal fan - this is the HVAC - blower motor fan ! You don't need to check every fuse , just the correct one's !Doing electrical testing is the proper way to find what's wrong . Is it missing battery voltage or is it the ground part of the circuit ! Do you know how to do automotive electrical testing using a DVOM - digital volt ohm meter ? How to use a wiring diagram to pin point testing places .
Investing in some sort of service repair manual to locate the proper power and ground points for the afected system , rather then guessing . An learning how to do proper automotive electrical testing is a must . Or you should probably take it to a qualified repair shop . Electric Testing Techniques You Need to Know
Without testing I like anyone on here I'd be guessing > I would think a loose connection . Maybe these to systems share a common ground . Do you know what a body ground is ? You need service info . find ground locations .