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need 2 now which wire is the rpm 1 on ecm

Old Jun 27, 2005 | 03:49 PM
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Default need 2 now which wire is the rpm 1 on ecm

hooking up a window switch and i need that wire
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Old Jun 27, 2005 | 04:01 PM
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Originally Posted by joejoe
hooking up a window switch and i need that wire
WHEN I CALLED AUTOMETER THEY TOLD ME I NEEDED TO HOOK THE RPM GAUGE UP TO THE BLUE PLUG ON THE COMPUTER WHITE WIRE PRONG NUMBER 10 WHEN HOOKING UP MY TACHOMETER AND SHIFT LIGHT.
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Old Jun 27, 2005 | 08:37 PM
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no way! pull the instrument cluster and get it on the plug that goes to it. still the white wire.
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Old Jun 27, 2005 | 10:49 PM
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thanks guys ill try that
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Old Jun 27, 2005 | 10:51 PM
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i tryed the #10 white wire but there was no wire on the blue side there was on the red side thou
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Old Jun 27, 2005 | 11:46 PM
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i have been told the white wire as well coming outta the cluster plug
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Old Jun 28, 2005 | 10:21 AM
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Don't grab the signal at the PCM -- grab from the instrument cluster.

There is an inverter or something between the PCM and the gauge. The signal at the PCM wouldn't drive my Megasquirt at all but the white wire on the cluster would.
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