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tach ?
should 505 wire to tach supply 12 vac at 1000 rpm on DDEC IV? Approx .02 at rest. I don’t have a ossilcope(sp) Or am I completely wrong? Bob
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3 Replies
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Bob, have you asked this question of Ken? He is the absolute DDEC guru.
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the 12 vac test worked on tach. prob now to be checked at ecm pin K1.
Jeff and Lindsay
91 Marathon XL -
to much trying to figure out. Need more info before calling Ken. Did discover it works on 50 cycles instead of 60. Gave up for today will recheck K-1 voltage out tomorrow. The way I understand the 60serries pre egr is 4 volt at 2100 rpm
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