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AM tachometer wiring

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easydean View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote easydean Quote  Post ReplyReply Direct Link To This Post Topic: AM tachometer wiring
    Posted: Aug/12/2018 at 3:44pm
I am trying to see if this tach works - black and orange are for the light (it works) - the other wires are yellow and yellow with a black stripe - anyone know what goes where???  Thank you, Dean
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Trader Quote  Post ReplyReply Direct Link To This Post Posted: Aug/13/2018 at 7:14am
If you can get your hands on an old battery charger then you can test the V+ , V- and the tach.
An "old" charger puts out 60Hz just like the 120 AC that feeds it.
That 60 Hz is a signal to a tach. 
1800 RPM for an 8 cylinder,
2400 RPM for a 6 cylinder,
3600 RPM for a 4 cylinder
Just touch the connectors to ensure you have the V+ and V- correct before actually testing the RPM signal or you can burn out the tach.
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Greyhounds_AMX View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Greyhounds_AMX Quote  Post ReplyReply Direct Link To This Post Posted: Aug/21/2018 at 10:21pm
What does the face of the tach look like?
1968 AMX 390 / T5
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