When checking your blue tach pulse wire for a pulse are you supose to get a 12V reading
07-15-2008, 04:31 PM
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When checking your blue tach pulse wire for a pulse are you supose to get a 12V reading
Hey guys Im trying to get my tachometer. Before asuming that the tach is bad I want to first check the signal wire and make sure Im getting a pulse around how many volts should this signal wire be
07-15-2008, 07:34 PM
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Re: When checking your blue tach pulse wire for a pulse are you supose to get a 12V reading (averyvm
The tach wire will have both AC and DC current on it when the car is running. Use the AC setting to determine if is a tack wire or not. This wire will read a very low voltage at idle, but will increase dramatically when the engine is revved. Commonly, a tach wire will go from a half a volt up to 3 or 4 volts. More is possible.
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