tach wiring - JeepForum.com
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post #1 of 2 Old 02-13-2002, 08:43 PM Thread Starter
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Join Date: Feb 2002
Location: Minturn, CO
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Post tach wiring

Can anyone tell me why I can't hook up an aftermarket tach to the tach plug on a factory '86 harness? The tach in question is a "factory replacement" tach from 4wd hardware, but same as all. In the instructions it says not to wire it to the factory plug. And I tried it and it doesn't work... Does the factory tach use some crazy wiring? Thanks

93vert is offline  
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post #2 of 2 Old 02-19-2002, 10:28 PM
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Join Date: Jan 2002
Location: Mississippi
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The factory tach uses the jeeps ingnision(spelling?) to get a signal. The factory replacement tack needs to be run to the tach side of the coil. Then to power and ground.
CR SETH is offline  

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