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boode

Member Since: 11 Apr 2012
Location: Devon
Posts: 436

Rear wiper motor dead

Simple question
My rear wiper has stopped working
The relay still outputs 12.6 down the green/red wire that goes into the motor, but the motor does not move.
Is this a dead motor, or could there be something else to check before I have to buy a replacement motor.
Many thanks

5th Jul 2014 3:49pm

Clive

Member Since: 21 Mar 2014
Location: Littleborough
Posts: 467

2004 Defender 90 Td5 X-Tech LE Zambezi Silver

Could be a break in the green/red wire where it comes through from the rear of the tub to the door or a broken/loose earth wire, best way to check is to test for voltage directly at the motor.

5th Jul 2014 4:18pm

K9F

Member Since: 12 Nov 2009
Location: Bournemouth
Posts: 9610

2008 Defender 90 Puma 2.4 XS CSW Stornoway Grey

Voltage at the motor still won't confirm the integrity of your earth. Ideally if you've a multimeter check for votage and check the earths too. You could just 'jury rig' a 12 volt filament in the circuit to check the wiring is ok. If it illuminates when the wiper is selected the motor's goosed.

If you go through life with your head in the sand....all people will see is an ar5e!!

Treat every day as if it is your last....one day you will be right!!

5th Jul 2014 4:24pm

boode

Member Since: 11 Apr 2012
Location: Devon
Posts: 436

OK thanks
I have 13.5v going into the top of the motor through the red/green wire when earthed onto the rear cross member.
But when the multi meter is put onto the black wire that also goes into the motor, then it only reads 1.2v.
I assume that the black wire is an earth ?
If I connect the wiper motor directly onto a battery it works fine.

Soi if I have an earth problem, how do I track it down and solve it?

Also if I turn on the rear window heater I then get 13v throuth the black wire - confusing

5th Jul 2014 5:12pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17868

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

HRW & RWW share an earth. It simply indicates that there's a break in the.earth connection from the door. Check the wires in the rubber trunk from the door.

5th Jul 2014 5:52pm

boode

Member Since: 11 Apr 2012
Location: Devon
Posts: 436

Thanks Blackwolf
The earth wire is intact through the rubber into a 6 pin connector located behind the metal cover .
From the connector onwards (a black/white wire) it is dead so must be broken somewhere - it dissapears down to the indicator and then under the aux fuel tank and after that I do not know where ?
So I need a new earth
There is an unused two pin connector (with a purple and a black wire) with all the other wires
Can I use this black wire as an earth for the wiper

Sorry to sound simple but electrics are not my strong point

5th Jul 2014 6:31pm

grafty99

Member Since: 15 Aug 2012
Location: North Devon
Posts: 4802

That earth is a good one, unused if you don't have 12S towing electrics

2002 90 Td5 Station Wagon
1990 Vogue SE
Triumph Tiger Explorer 1200
Td5 90 Thread http://www.defender2.net/forum/topic50767.html
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RRC Thread http://www.defender2.net/forum/topic54492.html
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5th Jul 2014 10:28pm

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