Thread: Wiring help
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Old 05-28-08, 11:46 AM   #2 (permalink)
hondacuraworld
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Car 1: 2004 Ford Mustang
The tachometer drive circuit (part of the main circuit) receives pulses from the PCM. The solid-state tachometer then displays these pulses as engine speed. For each 200 pulses per minute from the PCM the tachometer displays 100 RPM.
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