Join Today
Results 1 to 11 of 11
  1. #1
    Senior Member
    538 Nm on the old car. Now
    that was torquing!
    Blackdog's Avatar
    Join Date
    May 2010
    Location
    Tregaron
    Posts
    930
    Thanks
    163
    Thanked 312 Times in 212 Posts

    Rear wiper wiring

    The rear wiper on my 07 plate V70 has stopped working.

    I have checked the fuse and that is OK.

    So I'm thinking I have a broken wire in the loom and most likely the earth as neither the intermittent or continuous settings work.

    There are three wires going to the motor, white, yellow and black.

    I presume that the black is the earth but can someone confirm this before I start cutting the wires to run a seperate earth.

    Thanks.

  2. #2
    Senior Member
    Keeping it looking stock
    Harvey's Avatar
    Join Date
    Mar 2012
    Location
    Newton abbot, Devon
    Posts
    5,567
    Thanks
    920
    Thanked 1,581 Times in 1,296 Posts




    SB is black
    W is white
    Y is ..yellow
    Last edited by Harvey; Tuesday 3rd October 2017 at 20:16.

  3. The Following User Says Thank You to Harvey For This Useful Post:

    Blackdog (Tuesday 3rd October 2017)

  4. #3
    Senior Member
    538 Nm on the old car. Now
    that was torquing!
    Blackdog's Avatar
    Join Date
    May 2010
    Location
    Tregaron
    Posts
    930
    Thanks
    163
    Thanked 312 Times in 212 Posts
    Thanks Harvey.

    Looking at that I'm glad I don't have an XC90.

    If I'm reading that right it would be a mass of white wires.

  5. #4
    Senior Member
    ...here we go again...
    LeeT5's Avatar
    Join Date
    Oct 2004
    Location
    Kent
    Posts
    5,337
    Thanks
    1,075
    Thanked 1,393 Times in 1,068 Posts
    I would probe the motor plug with a live to confirm it's not the motor before you go chopping wires.
    Easy enough to check continuity on the earth.

    Likely to be a broken wire in the lume where it passes through the tailgate and into the body.
    2014 V60 Polestar 6spd Auto :: Polestar map peak boost 17.4psi :: IPD 3" DP + 150cel :: Polestar 2.5" exhaust :: Paddle Shift Geartronic :: Black glass :: Maxton Splitter :: K+N Filter :: IPD Aluminium Top engine mount :: Brembo 6 pots :: 20" Polestar rims :: Brembo 371mm floating discs :: Sensus RTi + DAB + BT + WIFi :: D3S XENARC 6000k Active bending headlights

  6. The Following 2 Users Say Thank You to LeeT5 For This Useful Post:

    Blackdog (Wednesday 4th October 2017),MoleT-5R (Wednesday 4th October 2017)

  7. #5
    Gearbox Killer
    Proving the power of the
    15g....13.4@104.3mph
    MoleT-5R's Avatar
    Join Date
    Jun 2011
    Location
    Mid-Wales
    Posts
    5,624
    Thanks
    2,798
    Thanked 2,673 Times in 1,797 Posts
    As Lee has said above, have you tested all the connections with a multi meter for supply voltages and and continuity on the earth, as if it's anything like my 850's, it's the mechanism that seizes and swapping for another know item could be a quick way to pin point the issue. That is if you have access to one as, you don't want to be cutting up your wiring harness if you don't need to.

    Current Volvo's 1995 854 Gul T-5R 1996 855 Olive T-5R 1997 855 Olive AWD 1999 V70R AWD and 2005 XC90 D5 AWD
    Previous Volvo's 1987 745 gle 1989 745 GL 1995 855 Olive GLE 2001 V70 p2
    My Ebay Items http://www.ebay.co.uk/usr/quik.connection

  8. The Following 2 Users Say Thank You to MoleT-5R For This Useful Post:

    Blackdog (Wednesday 4th October 2017),LeeT5 (Thursday 5th October 2017)

  9. #6
    SpongeBob Foamypants
    Back in a V70 and happy!!
    foammanmark's Avatar
    Join Date
    Nov 2011
    Location
    Nowhere near Blackburn.....
    Posts
    7,668
    Thanks
    1,604
    Thanked 1,449 Times in 1,272 Posts
    My rear wiper on my 98 R had stopped working when I recently bought her back. I sussed out that with the wiper switched on and a little gentle persuasion, it works again. Did it again only yesterday but is now working again after heavy rain meant it had some exercise.

  10. The Following User Says Thank You to foammanmark For This Useful Post:

    Blackdog (Wednesday 4th October 2017)

  11. #7
    Senior Member
    538 Nm on the old car. Now
    that was torquing!
    Blackdog's Avatar
    Join Date
    May 2010
    Location
    Tregaron
    Posts
    930
    Thanks
    163
    Thanked 312 Times in 212 Posts
    Motor is working as I bought a used replacement that was tested in front of me.

    Ised a multi meter to pierce the insulation and have a 12v on one of them.

    So it looks like a broken earth.

    What i will do though just to totally confirm prior to chopping is run a wire from the battery negative to the motor casing and see if it works.

  12. #8
    Senior Member
    ...here we go again...
    LeeT5's Avatar
    Join Date
    Oct 2004
    Location
    Kent
    Posts
    5,337
    Thanks
    1,075
    Thanked 1,393 Times in 1,068 Posts
    Quote Originally Posted by Blackdog View Post
    Motor is working as I bought a used replacement that was tested in front of me.

    Ised a multi meter to pierce the insulation and have a 12v on one of them.

    So it looks like a broken earth.

    What i will do though just to totally confirm prior to chopping is run a wire from the battery negative to the motor casing and see if it works.
    I doubt that will work as it's probably earthed internally.

    All you need to do it set your multimeter to 'Ohms' and check you have an Earth (continuity) in the other wire/s that are not 12v (live) or 12v (switched live).

    If you have access to a power probe, you could then, once you've established the live in and earth terminals on the motor, using the power probe give the motor a live and earth. If it doesn't work then you can be 100% it's the motor.

    If you have live and earth from the wiring harness, then the motor should work.
    Last edited by LeeT5; Thursday 5th October 2017 at 00:47.
    2014 V60 Polestar 6spd Auto :: Polestar map peak boost 17.4psi :: IPD 3" DP + 150cel :: Polestar 2.5" exhaust :: Paddle Shift Geartronic :: Black glass :: Maxton Splitter :: K+N Filter :: IPD Aluminium Top engine mount :: Brembo 6 pots :: 20" Polestar rims :: Brembo 371mm floating discs :: Sensus RTi + DAB + BT + WIFi :: D3S XENARC 6000k Active bending headlights

  13. The Following User Says Thank You to LeeT5 For This Useful Post:

    Blackdog (Thursday 5th October 2017)

  14. #9
    Senior Member
    538 Nm on the old car. Now
    that was torquing!
    Blackdog's Avatar
    Join Date
    May 2010
    Location
    Tregaron
    Posts
    930
    Thanks
    163
    Thanked 312 Times in 212 Posts
    I know the motor is good as I have seen it running. When demonstrated it was earthed via the casing.

  15. #10
    Gearbox Killer
    Proving the power of the
    15g....13.4@104.3mph
    MoleT-5R's Avatar
    Join Date
    Jun 2011
    Location
    Mid-Wales
    Posts
    5,624
    Thanks
    2,798
    Thanked 2,673 Times in 1,797 Posts
    Quote Originally Posted by Blackdog View Post
    I know the motor is good as I have seen it running. When demonstrated it was earthed via the casing.
    So this is a replacement unit.?

    Current Volvo's 1995 854 Gul T-5R 1996 855 Olive T-5R 1997 855 Olive AWD 1999 V70R AWD and 2005 XC90 D5 AWD
    Previous Volvo's 1987 745 gle 1989 745 GL 1995 855 Olive GLE 2001 V70 p2
    My Ebay Items http://www.ebay.co.uk/usr/quik.connection

  16. #11
    Senior Member
    538 Nm on the old car. Now
    that was torquing!
    Blackdog's Avatar
    Join Date
    May 2010
    Location
    Tregaron
    Posts
    930
    Thanks
    163
    Thanked 312 Times in 212 Posts
    Yep. The original stopped working so in my infinite wisdom I took it apart expecting to find a seized gear mechanism. This was not the case so I the decided it would be a good idea to check the brushes and rotor. I do not recommend this. Brushes and springs everywhere. So off to the brealers for a replacement. Put it in and it too did not work. Back to the breakers and ir was tested in front of me and shown working. As I said the fuse is good and 12v to one of the supply cables when switched on, hence why I think the earth wire is broken.


 

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
This website uses cookies
We use cookies to store session information to facilitate remembering your login information, to allow you to save website preferences, to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.
     
ipv6 ready