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Hall sensor test 700 1989

posted by  Dick Slessig on  Sun Aug 19 18:14 CST 2018
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last visit: Wed Oct 22 15:14 CST 2014
[RELATED]

Help!

I need some guidance re hall sensor testing. I’m attempting to do the “full hall sensor test” as laid out in the FAQs, but I’m finding myself confused as to which “above the brake pedal” connector is the one referred to in the instructions. The voltage at the distributor connection all checks out, but now I’m stymied.








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    Hall sensor test 700 1989

    posted by  Dick Slessig on  Fri Sep 28 08:17 CST 2018
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    last visit: Wed Oct 22 15:14 CST 2014
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    Problem solved. After performing John Sargent’s hall sensor test described below (it failed), I went ahead and ordered a new distributer, put it in and now it’s back to spinning like a top. Thanks to everyone for their input!








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    Hall sensor test 700 1989

    posted by  aleekat on  Sun Aug 19 19:46 CST 2018
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    last visit: Fri Oct 24 13:19 CST 2014
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    Have you inspected the plastic connector for the hall sensor at the base of the distributor? Know issues plastic breaking cracking and wire shorts out against the distributor.
    --
    Post Back. That's whats makes this forum work.








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      Hall sensor test 700 1989

      posted by  Dick Slessig on  Sun Aug 19 21:31 CST 2018
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      last visit: Wed Oct 22 15:14 CST 2014
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      Everything looks clean and sound back there on the wire/ connector side. I’ll have to break out the inspection mirror to check the connector on the distributer.








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        Hall sensor test 700 1989

        uid 55's pic
        posted by  john sargent on  Mon Aug 20 15:58 CST 2018
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        last visit: Wed Oct 22 09:07 CST 2014
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        I have parts, and complete Hall effect distributors.

        A simple test is to remove the distributor, leaving it plugged in to the Hall effect three wire connector. Ground the coil lead, turn the key on, and spin the distributor. You should hear the injectors clicking.
        --
        john








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          Hall sensor test 700 1989

          posted by  Dick Slessig on  Mon Aug 20 20:43 CST 2018
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          last visit: Wed Oct 22 15:14 CST 2014
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          Do you mean ground the main wire from coil to distributer cap?







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            Hall sensor test 700 1989

            uid 55's pic
            posted by  john sargent on  Tue Aug 21 15:33 CST 2018
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            last visit: Wed Oct 22 09:07 CST 2014
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            Yes, ground the coil wire so you don't get lit up.

            I would leave the cap off if you use my test.
            --
            john








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              Hall sensor test 700 1989

              posted by  Dick Slessig on  Wed Aug 22 08:59 CST 2018
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              last visit: Wed Oct 22 15:14 CST 2014
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              Thanks John.
              I'm using your test. Distributer's out, coil's grounded, ignition is on and the injectors don't make a peep when I spin it. Is this a dead giveaway that the hall sensor has failed, or is there some other culprit I should look at first?








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                Hall sensor test 700 1989

                uid 55's pic
                posted by  john sargent on  Wed Aug 22 16:34 CST 2018
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                last visit: Wed Oct 22 09:07 CST 2014
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                Nothing else to fail which I have encountered. How does the wiring harness to the Hall sensor look?

                I have at least four Hall effect distributors in my stock of parts, and we no longer have cars which use them. Some have new shaft seals and all have good wiring connectors. If you want one to test with, please contact me. Just pay for shipping. If you need to keep it, I'll make you a bargain. For this purpose, my email address is my name at outlook.com.
                --
                john







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