How to Connect Dwell Tach Meter
#1
Safety Car
Thread Starter
How to Connect Dwell Tach Meter
My meter has 3 hookups. A red and black clips and a white clip.
Black to ground, red to negative coil and...........?
Black to ground, red to negative coil and...........?
#2
Le Mans Master
#3
Melting Slicks
Just a simple question and not trying to be a smart a$$. Why the white wire at all??? My tach/dwell meter only has the black and red leads. Works just fine and has for over 30 years. What is the white wire for?
#4
Le Mans Master
Every one that I have ever used has power leads and a signal. How else is it to read the RPM or the dwell.
#6
Team Owner
Member Since: Mar 2003
Location: Greenville, Indiana
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There are both two wire and three wire tach/dwell meters. I'm not sure but I think the two wire meters are later design circuitry and pick up their power off the ignition side of the coil.
#10
Le Mans Master
OK, so I haven't bought one in over 40 years. Haven't paid any attention to the new ones.
#11
Team Owner
Member Since: Oct 2000
Location: Washington Michigan
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I bought mine 45 years ago, and it has two wires - one to ground, the other to the coil (-); they don't make them like this any more - chrome die-cast housing, and glass lens on the meter.
#12
Safety Car
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Location: New York New York
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2023 C2 of the Year Finalist - Unmodified
2023 C1 of the Year Finalist - Unmodified
Some analog meters back then were multi-function, tach, dwell, volts and ohms. So you needed the extra lead to read battery volts or resistance.
Joe
Joe
#13
Le Mans Master
#14
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Looking a little closer, it looks like there is a hole in the handle for another lead to come out and it's missing!
Never thought about this until now.
#15
Safety Car
Thread Starter
Thanks all
Wombvette- thank you
Wombvette- thank you