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Bam427
Dodge Dakota
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3/20/2008
23:07:06
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 Subject: installing tachometer
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Message:
i tried installing a tach into my 1987 3.9 v6 dakota i had it wired up to the coil but was getting nothing, so i tested it with a tester, i had volts and dwell but no rpms ???
anybody have a idea?
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Bob Lincoln
Dodge Dakota
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3/21/2008
07:34:35
|  RE: installing tachometer
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Message:
How did you wire it to the coil? Positive or negative terminal?
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pete
Dodge Dakota
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3/21/2008
09:57:00
| RE: installing tachometer
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Message:
negative side of coil and attach the positive lead from tach then should work
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shadetree
Dodge Dakota
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3/21/2008
11:01:25
| RE: installing tachometer
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Message:
All the tachs I have seen have four wires a red positive 12 volt switched source, a white wire that gets tied to you dash lights, a green signal wire that gets tied to the negative on the coil, and a black that goes to ground. Then there is also usually a dip switch on the tach to select the number of cylinders. I would make sure you have a good ground then check you other connections.
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Bam427
Dodge Dakota
JOIN HERE
3/21/2008
11:58:41
| RE: installing tachometer
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Message:
well the tach i have has 5 wires white, black, green, red and a orange, its a trisco tach
right now not worried about the tach, wondering why my tester did show any rpms
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J and J Auto
GenII
3/26/2008
23:36:18
| RE: installing tachometer
IP: Logged
Message:
neg side and ground
square wave drive as most tachs are
Larry
J&J Auto
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