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Wiper issue!

Posted: Thu Jul 01, 2010 12:20 pm
by tonicaek
Hey guys would like your thoughts on what might be going on with my wipers!

Jeremy passed his MOT two weeks back and I've been merrily driving him about in this glorious weather we've been having. However, I realised the day after the MOT pass that his wipers are on the blink. Took him for a half hour drive with them on (the joys of summer showers) and they worked fine, parked up for a while, then set off again only to find them gradually getting slower and slower until finally stopping all together. We had a look at them, tried some of the suggestions we'd stumbled across on the forums (tightening the nut connecting the cable to the wiper motor, replacing the brushes, giving the motor a general once over.. Etc..) But each to no avail, they worked for a few swipes then gradually slowed to a halt again. We also found that using the wipers drained the battery extremely fast.

Now, the fun part. I took the old boy out for a drive Tuesday morning, and was hit suddenly by a heavy downpour of rain. Not good. Tried the wipers and they swiped twice, slowed and finally stopped in the middle of my view, then the car began to lose power and that was it, dead. In the middle of rush hour. On a busy road. Joy. :oops:

There was absolutely no power going to the ignition, so I called a friend to help, and they turned up with a charged battery. We replaced the old one, no difference. Waited three hours for the recovery guy and worked out a fuse had blown - turned out the wipers has shorted somewhere and had blown the ignition fuse.

We're going to take a look behind the dash sometime over the weekend to see if the wiring is okay, but to be honest, I think it's the motor. It's not the original, I think it's a two-speed that the previous owner had fitted, and the switch isn't original, it's some ghastly, ruddy huge knob that looks like it's been ripped out from a Land Rover.

Suggestions as to the cause of this issue would be more than appreciated, 'cos I'm pretty stumped! :(

Re: Wiper issue!

Posted: Thu Jul 01, 2010 1:38 pm
by chickenjohn
see if you can get an original switch and wiper motor complete with rack.

Then take a look at the wheel boxes, these can sieze after many decades as the grease hardens.

Re: Wiper issue!

Posted: Thu Jul 01, 2010 1:47 pm
by Nuffles
Land Rover wiper switches came out of the Metro parts bin I'll have you know!

Unfortunately I have nothing useful to add to the topic :oops:

Re: Wiper issue!

Posted: Thu Jul 01, 2010 4:36 pm
by chickenjohn
I'm thinking what might have happened is this:-

1) Wiper Wheelbox froze
2) Wipers stopped
3) Wiper motor burnt out
4) fuse went.

Why this stopped the car, i don;t know. Maybe there are further bodges in your cars electrics. If you are not confident with the test meter and soldering iron, it might be a good idea to see an auto electrician!

Re: Wiper issue!

Posted: Thu Jul 01, 2010 6:41 pm
by bmcecosse
Yes - there is NO fuse in the ignition circuit - or in the fuel pump circuit. So that can't be why the engine stopped. Slow wipers can be caused by non-charging battery........ Check the volts at the battery when the engine is running at fast idle. Maybe the fan belt is loose -and gives just enough charge to run the car in good weather - but in rain with lights/wipers/heater running - the battery is discharging. However - The rack and wheel boxes are likely all 'gummed up' - so well worth stripping them out and giving a good clean and re-grease. If you are cunning - you can re-instate the wheelboxes so the spindles are at 180 degrees to where they were before(mark them before stripping) so they will be running on the unworn section of the gear - and it's also possible to turn the rack over so it's unworn too!

Re: Wiper issue!

Posted: Fri Jul 02, 2010 10:20 am
by Kevin
bmcecosse wrote: However - The rack and wheel boxes are likely all 'gummed up' - so well worth stripping them out and giving a good clean and re-grease.
Yes inclined to agree as I have seen the 50 year old grease almost harden to a wax like consistancy which obviously puts a strain on things.

Re: Wiper issue!

Posted: Fri Jul 02, 2010 5:57 pm
by aupickup
i would say old gummed up grease
i have seen old boxes where all the grease is so hard they will not turn