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Rob Johnson Posted on Aug 13, 2016
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1993 Thunderbird overdrive out everything else works great

  • Timllfixit Aug 13, 2016

    Rob,as its 20 years old have a good look at harness ground connections. Don't just eyeball them, loosen the bolt, swing the tag to and fro to ensure rust free fitting. Retighten. Check the heavy ground connection on the battery and any engine to frame grounding straps / cables. At this age a good many weird goings on are corroded harness multi connectors and terminals. If any connectors look corroded spray WD or similar on them. Don't put general grease on battery terminals, it enhances corrosion, use petroleum jelly, like Vaseline, but clean posts and cable before hand.

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  • Ford Master 2,210 Answers
  • Posted on Aug 13, 2016
Timllfixit
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Same answer as previous. Fuse or speed sensor but if you can, find the speed sensor and see if the harness connections are actually there and you haven't got a wire pulled off by a bit of road debris.

  • Rob Johnson
    Rob Johnson Aug 13, 2016

    I have been having a couple of electrical demons head lights flashing and starter wouldn't work the other day all I did was pull relay put it back in and it worked so im thinking something fishy

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