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Originally Posted by madmike17
Yes, the vibrator clearly runs. The only solution I can think of is to just turn the vibrator around. Could this be damaging if I'm wrong? What if i just disconnected the center tap to see if there is voltage when the vibrator is switched so that nothing could be harmed?
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That's a good thought. But leave C34 in-circuit and disconnect everything 'downstream' from it. C34 can't be hurt by reverse polarity, even with full "B minus" voltage on it.
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Also, voltage off the center tap should be DC, right?
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Yes. And C34 should provide enough filtering for the meter (Digital meters tend to go nuts on unfiltered waveforms).
Is the truck negative or positive ground?