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Old Sep 13, 2009 | 12:06 PM
  #1  
jbt_92's Avatar
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From: Louisiana
Need help

I hooked my tach up and nothing is working except the lights. Im not sure whats wrong. Any information is greatly appreciated.
Old Sep 13, 2009 | 12:11 PM
  #2  
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why do you need an aftermarket tach?
Old Sep 13, 2009 | 12:24 PM
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I dont have a after market tach. Its just not working.... After market tachs are for douches. LOL
Old Sep 13, 2009 | 12:38 PM
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oh.. LOL. uhhh did you plug it in? lol
Old Sep 13, 2009 | 03:47 PM
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gonna need a bit more info.
Old Sep 13, 2009 | 04:36 PM
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It should just plug into the wiring harness. Check the line for a "pulse". I remember my Neon had an aftermarket tach that didn't work . . .I read the Haynes manual and found the proper line to hook it too . . .bam.

If the original connections don't work, find that line (Hit up Autozone, Advance or O'Reilly for the manual if necessary) and get it going.

-Dave
Old Sep 14, 2009 | 04:22 AM
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doesn't plug into any wiring harness. you must tap the signal wire into the ignition coil signal wire.
Old Sep 14, 2009 | 07:55 AM
  #8  
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Originally Posted by Biggamehit
doesn't plug into any wiring harness. you must tap the signal wire into the ignition coil signal wire.
That's what I figured, but I also assumed (probably part of my problem) that if it's the stock gauge cluster that there's a hook up for it or something.
Old Sep 14, 2009 | 10:31 AM
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the signal wire for the tach is part of the smaller body harness. to the side of the ecu.
Old Sep 14, 2009 | 06:34 PM
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Originally Posted by Biggamehit
doesn't plug into any wiring harness. you must tap the signal wire into the ignition coil signal wire.
Explain? Im trying not to be too slow. lol
Everything is plugged up. I don't know what it is.
Old Sep 15, 2009 | 01:35 AM
  #11  
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the signal wire from the aftermarket tach goes to the Positive wire on the Ignition coil. I made this from the FSM....... the red line is pointing to the location of the wire you must tap into. Its been years since I hooked one up... so you will have to test with a volt meter or test light to see which wire carries the juice. Name:  240sx_aftermarket_tach_signalwire_l.jpg
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Old Sep 15, 2009 | 05:38 PM
  #12  
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Okay so that helps a little. But its not aftermarket. So I thought it would just plug right in and work.. If this one is just a little *** then i might have to get a aftermarket one..
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