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Discussion Starter #1
I read that there is a tach signal going into the gauge cluster...is that the easiest/best way to connect the green wire ? If not what should I do ?
 

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Discussion Starter #4
Alright. I'm getting very frustrated. So far everything I have read isnt working. Pin 10 isnt white its purple on the black plug. I have my cluster out trying to use a voltmeter to find the signal on the wires going into the cluster clip and found out the voltmeter i have doesnt read past 1000 volts. Someone help. I have a 98 4.3 5 speed manual s10. Thanks
 

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why would u need a voltmeter that reads past 1000 volts when tach should be between 1 and 6 volts AC..so make sure ur voltemeter is on alternating current and test the wire....at rest it shouldn't read anything then while running it should read between 1-6 volts AC....like orang said its a white wire that could be connected at the coil or i think its also at the black plug on the ecm..u don't have to drill through the firewall just poke like and anteena throuhga rubber grommet and feed the wore through that way
 

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10 pin at the gauges inside the truck??
 

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don't count the pins ..like i said its white and i belive it in the black plug.....if not u can grad it at the ignition coil or any of the injectors...if u grab the tach signal from an injector look at all of them ...each injector will have one wire on all of them that is the same color...tap into the one that is an opposite color
 

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Discussion Starter #10
I have the tach installed...but there is no signal for the tach. I have it hooked up to pin 20 on the red plug which is a white wire. Everything else works like the lighting of the tach. Help.
 

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sabre said:
I have the tach installed...but there is no signal for the tach. I have it hooked up to pin 20 on the red plug which is a white wire. Everything else works like the lighting of the tach. Help.
dude you would have been done and lookin at you tach working if you would have just listened to me...go to the coil under the hood...its simple to run wires out there...


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VSS Wire: Loc 17 Black 24 Pin Conn Pos 3 (also requires 250-4255)
VSS Wire Color: Green/White
VSS Pulse: 4000
VSS Tach Wire: Loc 17 Clear or White 32 Pin Conn Pos 9
Tach Signal Wire Color: White
Brake Switch Positive: Orange
Brake Switch Negative: White


This is done at the PCM in the engine compartment
 

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Discussion Starter #14
So which plug and which pin on the pcm ? So far I've been told the black the red and the white plug pin 10 and 20. Does anyone really have a clue because everyone has told me something different

VSS Wire: Loc 17 Black 24 Pin Conn Pos 3 (also requires 250-4255)
VSS Wire Color: Green/White
VSS Pulse: 4000
VSS Tach Wire: Loc 17 Clear or White 32 Pin Conn Pos 9
Tach Signal Wire Color: White
Brake Switch Positive: Orange
Brake Switch Negative: White

What is all that suppose to mean ?
Are you saying the white wire on the white plug ?
 

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Discussion Starter #18
Are you sure this works ? I don't want to connect it and find it that don't work either. What manual are you reading this from ?
 
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