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td signal
this is a voltage put out by the ignition unit that keeps the f/p relay in after start.it is also connected to the tach,the climate control relay, the main computer [i may have missed one]it starts out at approx 10vdc at idle and goes down slowly as rpm's rise.it's possible that the ignition unit has quit sending this signal but still sparks,but more likely that broken wire or one of the other consumers dragging to ground.should be able to identify at inner left fender near ignition box as a green wire with yellow stripe.
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