2006 Ford Ranger Coil Negative wire

2006 FORD RANGER
41,000 MILES • 4 CYL • 2WD • MANUAL
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CONDONED
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I need to tap into the Tach wire on my truck, and my kit suggested I connect to the negative side of the coil. How do I know which wire this is as it is a wiring harness?
Feb 15, 2009 at 1:00 PM
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BLACKOP555
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right at the ignition coil turn key on the start position and back probe for a pu lsing -12v hat is the one.
Feb 24, 2009 at 11:21 PM
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