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Central lock is discharging battery 200 1986

posted by  whitejim on  Sun Apr 17 05:59 CST 2005
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1986 240 DL
We have traced a battery discharge to fuse #8, which includes cab light, trunk light, additional lights and the central locks. Have checked lights and eliminated as source of the drain, leaving central lock as possible culprit. It seems to function alright, but how do we check to see if this is the cause of the drain?

We also show a drain on fuse #9, hazard light and gear shift indicator. We removed that fuse also and are trying to figure out that source. Our overdrive does not work and don't know if that is related. We have been disconnecting battery after use to avoid the drain, but would like to solve the problem. Any suggestions? Jim








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    Central lock is discharging battery 200 1986

    posted by  c_j_mooney on  Sun Apr 17 14:47 CST 2005
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    last visit: Wed Sep 14 17:39 CST 2011
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    I've been afflicted by the central-lock battery drain phenomenon a few times. The problem usually seems to be the switch that wraps around the lock cylinder (driver's door), and usually manifests itself during cold weather. Seems the switch is reluctant to return to the neutral position after locking the doors with the key. Try removing it from the lock cylinder, setting it to the centre (neutral) position (it'll take a close look to see what actually moves). I expect you'll find no drain then. Remedy is cleaning or replacing it. Hope that helps!
    --
    Chris, Dartmouth NS Canada 70 M-B 280SE, 83 245DL, 84 244 turbo, 90 780 turbo, 92 VW Golf








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      Central lock is discharging battery 200 1986

      posted by  Cliff Pope on  Sun Apr 17 20:16 CST 2005
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      last visit: Thu Feb 3 05:28 CST 2011
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      Or the in-line switch at the bottom of the pop up button on the driver's door. If the internal spring gets a bit weak it can switch on by itself under gravity. You can't get inside it, but a semi-permanent bodge is to wrap a bit of plastic tape round the button to create some friction at the door cap hole.








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    Central lock is discharging battery 200 1986

    posted by  Bill N. on  Sun Apr 17 06:12 CST 2005
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    last visit: Sat Aug 16 14:09 CST 2014
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    My 1st look would be at the wires to the shift lever light and the one in particular that controles the over-drive. I had a problem like yours but did not detect any battery drain mainly cause I didn't look to see if there was one going on. But I did find the solinoid wire from the over drive-button was broken. That could be where you drain is occuring or from the light at the shift lever ---there's a lot of motion going down there every time you shift and thus causes the wire to fail.

    Let Me know if I am correct --always learning!!!!!!!!







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