Sam Coombes Posted July 7, 2008 Share Posted July 7, 2008 My rear wiper doesn't work - it hasn't done since I've had it. I put a meter on the motor - nothing. i put the meter on the switch - nothing. Fuse is ok, what else could I check? Is this a common failure? Thanks Quote Link to comment Share on other sites More sharing options...
western Posted July 7, 2008 Share Posted July 7, 2008 either a duff switch or a stuck motor, at the hinge side find the rubber cable duct & the plug/socket check the continuity from switch connections to these & motor connection to them, if all fine the motor is dead. Quote Link to comment Share on other sites More sharing options...
LandyManLuke Posted July 7, 2008 Share Posted July 7, 2008 I put a meter on the motor - nothing. i put the meter on the switch - nothing. What kind of nothing? no voltage? no continuity? no current flow? Quote Link to comment Share on other sites More sharing options...
western Posted July 7, 2008 Share Posted July 7, 2008 this wiring diagram might help. the motor shaft on mine got stuck, a good dose of WD40 down the shaft while running the motor cured it. Quote Link to comment Share on other sites More sharing options...
JonJon Posted July 7, 2008 Share Posted July 7, 2008 Right on, Sam! Mine hasn't worked either and have been loathe to post the question as there've been other, more oily and significant issues to ask about. Also didn't want tot get the "get a grown-up to help" response, which is never helpful. When wife returns, I'll give Western and LML's advice a go; good luck with yours! Jon Quote Link to comment Share on other sites More sharing options...
Sam Coombes Posted July 8, 2008 Author Share Posted July 8, 2008 ok, still no joy. i've now got power to the motor but it's having none of it. I removed the motor and dis-assembled it all. I see the two square pieces of copper have become dislodged. Where do they fit back in? Could this be the cause of the problem, or could the motor be fudged? How can I tell? Many thanks Quote Link to comment Share on other sites More sharing options...
Les Brock Posted July 8, 2008 Share Posted July 8, 2008 Them be the brushes Fit back in the brass slottly things with the springs all held in place with the bit you've taken out....and needs 20 hands to put back together Quote Link to comment Share on other sites More sharing options...
Sam Coombes Posted July 8, 2008 Author Share Posted July 8, 2008 Like this? If so, I can see them springs being a b*tch to get back in!! Quote Link to comment Share on other sites More sharing options...
western Posted July 8, 2008 Share Posted July 8, 2008 Those brushes have had it, they should be a fair bit longer. Quote Link to comment Share on other sites More sharing options...
western Posted July 8, 2008 Share Posted July 8, 2008 Like this? If so, I can see them springs being a b*tch to get back in!! Yep. try a bit of thin wire around them to hlod in place & pull the wire out when the 2 parts are almost back together Quote Link to comment Share on other sites More sharing options...
Sam Coombes Posted July 8, 2008 Author Share Posted July 8, 2008 Damn! I'm probably the most impatient person on this planet!! nevermind, will have a go.... Quote Link to comment Share on other sites More sharing options...
Sam Coombes Posted July 8, 2008 Author Share Posted July 8, 2008 this really is an impossible task - surely!? How else can I do it? Tried wire, long nose pliers etc. Any advice very much appreciated! Quote Link to comment Share on other sites More sharing options...
Sam Coombes Posted July 10, 2008 Author Share Posted July 10, 2008 Am I doing this right? If so, it's so bloody hard, I cant see how I'm gonna get these in - surley they'll pop back out when the motor turns? Cheers Quote Link to comment Share on other sites More sharing options...
Big_John Posted July 10, 2008 Share Posted July 10, 2008 Think you've got 'em the wrong way round mate, the springs should be on the inside of the brass channels and the copper bits touching the thing that goes in the middle (commutator?). That transfers the electrickery to the middle part, electricuting the wound wires and making it magnetic, this making it move. Or sommit like that! Edit to say : I've not actually taken one of these apart, so am prepared to be corrected... Quote Link to comment Share on other sites More sharing options...
Sam Coombes Posted July 10, 2008 Author Share Posted July 10, 2008 cheers john, you're right. I've got it all back together in the correct order, with the brass square bits touching the inner round copper bit on the shaft. Still no joy. I can hear a very faint clicking when it's powered up, but there is no movement. Oh well, now i'll have to track down another one :-( Quote Link to comment Share on other sites More sharing options...
Big_John Posted July 10, 2008 Share Posted July 10, 2008 Could be as Western said ^^^ that the brushes are worn out. If there's brown glaze on the contact surface (where it's worn to the shape of the spindle) then you could try roughing them up with some sandpaper to make a better contact, also on the spindle side (don't go too hard on that though otherwise you'll wear it away which isn't the idea). The brushes will wear with time and are designed to be replaceable - not sure if you'll find any these days though, depends if you've got a decent auto-electrical place about (there's a great one in Redhill, manned by an old bloke in a green canvas apron, no till, not even a calculator, just a note pad, a well worn little chart he uses to work out the VAT and a wooden drawer with dividers to put the cash in!!). Could try a main dealer if you fancy a laugh!! John Quote Link to comment Share on other sites More sharing options...
Steve King Posted July 10, 2008 Share Posted July 10, 2008 Quick question: is changing the brushes likely to sort out my rear wiper problems - it won't self park now and keeps on moving even when it's turned off? Steve Quote Link to comment Share on other sites More sharing options...
landmannnn Posted July 10, 2008 Share Posted July 10, 2008 Quick question: is changing the brushes likely to sort out my rear wiper problems - it won't self park now and keeps on moving even when it's turned off?Steve No. Your problem is much easier, just replace the selfpark switch on the motor gearbox. You might get away with cleaning the switch up. Quote Link to comment Share on other sites More sharing options...
Sam Coombes Posted July 10, 2008 Author Share Posted July 10, 2008 dont think i've much chance of finding somewhere local to replace the bushes tbh. Is a disco one of the same year likely to be identical? Like this one? Quote Link to comment Share on other sites More sharing options...
ThreePointFive Posted July 16, 2008 Share Posted July 16, 2008 My wiper has also never worked since my ownership of the vehicle. I have spent some time today trying to free it up as the wiper was stuck solid with the motor. Having freed it up, it still doesn't work. In the past I have tested current to the motor so this is not the problem. I also noticed that the housing of the motor seems to be missing some part. As it is, the housing has a large hole in the bottom with a dome shape leading up to it and two screw holes like something is meant to be attached, I am hoping someone can look at the pictures below and say if this is the case or not. What are these two wires for? Where should the movement for the wiper come from? The motor is not currently fixed because of the missing screws and revolves with the arm if it is turned unless held, but should the shaft appearing from out of the nut on the outside of the door revolve if it is powered normally, as the blade currently moves without this turning, and I am wondering if this means the link between motor and wiper is broken with the arm just being loose. Sorry to be untechnical in my description of things. Quote Link to comment Share on other sites More sharing options...
western Posted July 16, 2008 Share Posted July 16, 2008 Your's is missing the actual motor section, the gold section like mine below, hth Quote Link to comment Share on other sites More sharing options...
ThreePointFive Posted July 16, 2008 Share Posted July 16, 2008 I am guessing that may have something to do with it not working then . Thanks Western. Quote Link to comment Share on other sites More sharing options...
western Posted July 16, 2008 Share Posted July 16, 2008 I think you've guessed right & I've noticed the snipped wires too. hth Quote Link to comment Share on other sites More sharing options...
Sam Coombes Posted July 17, 2008 Author Share Posted July 17, 2008 so is a 1993 disco motor likely to a 1993 defender? The wiring looks the same, but not sure about the mounting of it.... Quote Link to comment Share on other sites More sharing options...
western Posted July 17, 2008 Share Posted July 17, 2008 it might fit, do a search as I believe someone on here has tried fitting a Disco rear wiper motor to a 90/110. part numbers are different so would expect the attachment or difference in the motor shape. Quote Link to comment Share on other sites More sharing options...
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