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Thread: Rear Electric Windows

  1. #1
    Join Date
    Apr 2011
    Location
    Wandong,Victoria,Australia
    Posts
    1,449

    Rear Electric Windows

    Hi All,

    1990 Range Rover SE

    On the weekend a passenger wound down a rear (passenger side) window - but the window wouldn't go back up....

    I haven't resolved the issue, but here is what I have done so far...

    * Checked the fuses - all ok (apart from one, which was for the cigarette lighter - which is now fixed. )
    * Tried to use the door switch - window could go down, but not up.
    * Tried the main switch in the console - window could go down, but not up.
    * At this stage - the window is all the way down...
    * Pulled out the console - swapped over the switch for the faulty door, with a switch from a working door... Still no go - and the working door kept working, so my mind says that switch isn't to blame.
    * While in the console - swapped the relays over. (At least I think that they are relays). Front doors still work - rear door still won't.
    * I have a spare door (damaged). Pulled it apart and removed the window motor. (It's a front door, but I *assume* that the motor is the same front vs rear)
    * Connected the motor directly to the battery - motor turns. So I have confirmed that the spare motor is ok.
    * Pull off the door card
    * Checked to see if the window was binding somehow OR if there were broken teeth on the mechanism - looked ok.
    * Connect the spare motor into the loom - try switches (on door & in console) - motor doesn't work..
    * Hmmm - this suggests to me that there is a fault in the wiring/loom.. Which kinda doesn't make sense, because the window powered down...
    * Went and removed a battery from one of the other cars.
    * Connected the in-door motor directly to the battery - window goes up!
    * So - I'm still thinking that it's a wiring issue? (Although again - that doesn't make perfect sense to me because the window powered down)
    * Yes - when testing, I checked that the button in the console that prevents windows from going up/down was in both positions.. And - sitting in the drivers seat, regardless of the position of this switch - both front windows work.

    So - could it be the switch which stops people from using the windows? (I only just thought of this) Hmmm

    Or - could it be a wiring issue?

    I put the window back up. Re-fitted the door card. Removed the rear window switches from the console to prevent accidental usage. And went to bed.

    Any ideas?

    Cheers,
    GG.
    1990 "Big Red" Range Rover
    1983 "The 101" 101 Forward Control
    1988 "Lizzie" FFR Perentie
    1961 "The Grey Ghost" LWB Series II Ute
    1960 "Roger" SWB Series II
    1976 "Max" 2 Door Range Rover Classic (being restored)
    1983 "Luke" Stage One V8 Station Wagon (next project)

  2. #2
    Join Date
    Feb 2013
    Location
    Ballarat,Vic,Aus
    Posts
    2,317
    Quote Originally Posted by grey_ghost View Post
    Hi All,

    1990 Range Rover SE

    On the weekend a passenger wound down a rear (passenger side) window - but the window wouldn't go back up....

    I haven't resolved the issue, but here is what I have done so far...

    * Checked the fuses - all ok (apart from one, which was for the cigarette lighter - which is now fixed. )
    * Tried to use the door switch - window could go down, but not up.
    * Tried the main switch in the console - window could go down, but not up.
    * At this stage - the window is all the way down...
    * Pulled out the console - swapped over the switch for the faulty door, with a switch from a working door... Still no go - and the working door kept working, so my mind says that switch isn't to blame.
    * While in the console - swapped the relays over. (At least I think that they are relays). Front doors still work - rear door still won't.
    * I have a spare door (damaged). Pulled it apart and removed the window motor. (It's a front door, but I *assume* that the motor is the same front vs rear)
    * Connected the motor directly to the battery - motor turns. So I have confirmed that the spare motor is ok.
    * Pull off the door card
    * Checked to see if the window was binding somehow OR if there were broken teeth on the mechanism - looked ok.
    * Connect the spare motor into the loom - try switches (on door & in console) - motor doesn't work..
    * Hmmm - this suggests to me that there is a fault in the wiring/loom.. Which kinda doesn't make sense, because the window powered down...
    * Went and removed a battery from one of the other cars.
    * Connected the in-door motor directly to the battery - window goes up!
    * So - I'm still thinking that it's a wiring issue? (Although again - that doesn't make perfect sense to me because the window powered down)
    * Yes - when testing, I checked that the button in the console that prevents windows from going up/down was in both positions.. And - sitting in the drivers seat, regardless of the position of this switch - both front windows work.

    So - could it be the switch which stops people from using the windows? (I only just thought of this) Hmmm

    Or - could it be a wiring issue?

    I put the window back up. Re-fitted the door card. Removed the rear window switches from the console to prevent accidental usage. And went to bed.

    Any ideas?

    Cheers,
    GG.
    I don't have this problem at all ....................................... Mostly because my back windows don't work at all I have tried to find the relays for the rear windows a couple of times .... Did you find them ? ( I have always spent 3minutes looking and given up ... as I don't like rear windows down either way).

    seeya,
    Shane L.
    Proper cars--
    '92 Range Rover 3.9V8 ... slugomatic
    '92 Range Rover 3.8V8 ... 5spd manual
    '85 Series II CX2500 GTi Turbo I :burnrubber:
    '63 ID19 x 2 :wheelchair:
    '72 DS21 ie 5spd pallas
    Modern Junk:
    '07 Poogoe 407 HDi 6spd manual :zzz:

  3. #3
    Join Date
    Mar 2011
    Location
    Western Australia
    Posts
    210
    Not sure where it is in a hard dash but a soft dash/D1 window lift ECU has issues with dry solder joints for the rear windows, I've fixed this before. Worth a shot, only other thing I could think of is dodgey switches but you ruled those out. Only issue I've ever had personally with the window motors is actually some of the teeth stripping on the regulator arm and I've never seen a issue with the actual wiring side of the power windows, only the ECU and switches.




  4. #4
    Join Date
    Apr 2011
    Location
    Wandong,Victoria,Australia
    Posts
    1,449
    Thanks Chivalry, I didnít even know that there was an ECU for the windows! I had assumed that they worked with relays and switches.. I need to investigate further.. Rear Electric WindowsRear Electric Windows
    1990 "Big Red" Range Rover
    1983 "The 101" 101 Forward Control
    1988 "Lizzie" FFR Perentie
    1961 "The Grey Ghost" LWB Series II Ute
    1960 "Roger" SWB Series II
    1976 "Max" 2 Door Range Rover Classic (being restored)
    1983 "Luke" Stage One V8 Station Wagon (next project)

  5. #5
    Join Date
    Feb 2013
    Location
    Ballarat,Vic,Aus
    Posts
    2,317
    Quote Originally Posted by grey_ghost View Post
    Thanks Chivalry, I didnít even know that there was an ECU for the windows! I had assumed that they worked with relays and switches.. I need to investigate further.. Rear Electric WindowsRear Electric Windows
    Its the plastic "thing" with all the wires going to it under the center consoles lift out glovebox. However it only does the front windows. I haven't traced out the wiring diagrams to find the rear window relays ( another "oneday" job).

    seeya,
    shane L.
    Proper cars--
    '92 Range Rover 3.9V8 ... slugomatic
    '92 Range Rover 3.8V8 ... 5spd manual
    '85 Series II CX2500 GTi Turbo I :burnrubber:
    '63 ID19 x 2 :wheelchair:
    '72 DS21 ie 5spd pallas
    Modern Junk:
    '07 Poogoe 407 HDi 6spd manual :zzz:

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