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Rear wiper intermittent funkiness 200 1990

posted by  B0RK ^3 on  Wed Aug 31 08:45 CST 2016
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last visit: Wed Oct 15 18:09 CST 2014
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So my rear wiper wasn't working. I popped open the tailgate inside panel and found the wire disconnected. I reattached it, now the intermittent is acting up. It's just all over the place. Stops mid way and half way, etc. I know for sure the hinge ground is broken, but it was fine before that wire disconnection. What gives? Any thoughts or answers? The constant rear wiper works just fine btw.

1990 Volvo 245 dl








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    Rear wiper intermittent funkiness 200 1990

    posted by  jon_h on  Fri Jun 22 23:10 CST 2018
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    last visit: Fri Oct 24 11:57 CST 2014
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    My 1990 wagon was doing the same thing. The wiper worked rarely with the tailgate down; more frequently with it up.

    It would light up the center brake light and the read defog switch light.

    I added a new ground on the left (facing forward) from the tailgate to the inside roof metal. I've done this before.

    I found a broken wire in the left hings; spiced it. Rear wiper now works as it should.
    --
    240 drivers / parts cars - JH, Ohio








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      Rear wiper intermittent funkiness 200 1990

      posted by  B0RK ^3 on  Sat Jun 23 12:07 CST 2018
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      last visit: Wed Oct 15 18:09 CST 2014
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      I replaced that ground, but yeah, I hate replacing that harness. It's possible its frayed somewhere, but the last time I took it apart and looked at it when it was acting up, it was visually fine. Unless it's broken on the inside of that black sheath then Idk, but the outside upon inspection, it wasn't frayed. I'd just hate to go through the replacement of that, for it not to be the problem. Which, I'm sure electrical testing would probably be beneficial at that point... Hmmmm








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    Rear wiper intermittent funkiness 200 1990

    uid 46171's pic
    posted by  kittysgreyvolvo on  Tue Oct 18 13:02 CST 2016
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    last visit: Sat Oct 18 15:23 CST 2014
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    If both ground wires are broken through both hinges, than the electrics in the tailgate receive - volt DC (ground) through both hinges and the tail gate latch.

    Not a reliable ground without the ground wire spanning the rear hatch (tail gate, or hhhwhutever you wanna call it) hinges.

    If the hinges are worn, causing the tail gate to sag, with broken ground wires, it makes the problem worse.

    Both grounds are broken on my 1990 240 DL wagon (245), yet I installed new hinges from a junkyard 1993 245. So all remains tights and electrics are good.

    I'm uncertain the intermittent relay circuit. Or, I can't recall.

    http://www.volvowiringdiagrams.com/?dir=volvo/240%20Wiring%20Diagrams

    1990 240 diagram. PDF page 5.

    There may be articles treating problems with rear later 240 wagon wiper problems. A search of the brickboard may help.

    As you are in the rust belt of SE WI-state, maybe you have wire line (wire harness) corrosion problems? Doubtful.

    Hope that helps to get the conversation started. Your post here is some 49 days ago.

    cheers,

    Wants the WI-dairy. Unsure of WI-state as it is now, Governor. (Is the Aaron Rodgers-Packers era fading?)
    --
    Give your brickboard.com a big thumbs up! Way up! - Roger Ebert.








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      Rear wiper intermittent funkiness 200 1990

      posted by  B0RK ^3 on  Tue Jun 19 10:27 CST 2018
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      last visit: Wed Oct 15 18:09 CST 2014
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      I just fixed the ground to the hinges, no change. You only need to ground one side. Not sure why they have a ground on both hinges? (if one fails?) Still not sure why it's wonky. Anyone else?








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        Rear wiper intermittent funkiness 200 1990

        uid 46171's pic
        posted by  kittysgreyvolvo on  Tue Jun 19 15:28 CST 2018
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        last visit: Sat Oct 18 15:23 CST 2014
        [RELATED]

        Wonky through intermittent wiper feature only (rear wiper switch on stalk fully left). On is okay (rear wiper switch on stalk fully right).

        All other fuse 1 accessories are okay? Cigarette lighter, radio, and so forth?

        Connector from stalk to wire harness secure as is the brown wire ring term under one of two securing machine screws?

        The double pole switch contacts on the stalk may be at fault, I guess.

        The only one intermittent relay for both front and rear wiper system. Unless a second one I know not about.

        http://www.davebarton.com/pdf/relay_93_240.pdf

        87 location is the same in his host of PDFs on OvLov relay location.

        The right side wire harness to pass through the right side rear hatch / tailgate hinge appears okay when you look at it with the rear hatch / liftgate up or down?

        I see you replaced the right side harness in 2007. You used Volvo OEM or something like an MTC? If aftermarket, I'd guess that stuff may not last all too long is passed through the factory route with the weather / sunlight exposure and hinge action / wear (stetch as pin pulls through) and vibration. The copper strands are soft.

        https://www.tascaparts.com/oem-parts/volvo-cable-harness-1348019



        http://volvowiringdiagrams.com/

        The 1990 wiring diagram is in 240. Volvo 240 1990 ... PDF page 5 of 20.

        Page 6 or 20 shows the wiper relay without intermittent feature. Yet wiring from the stalk is the same?

        Mr. cGMP, I guess.
        ------
        My preemptive effort and outcome on my 1990 to replace both lift gate harnesses. The ground wire each side remains broken. Works fine.



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