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Registered User
Join Date: Oct 2010
Location: Southern NH
Posts: 3,553
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87 Tach wiring question
I am putting a tach from an 87 in my 82 930. Basically the main reason is that I am not using the factory boost gauge so I have no need for the 930 tach and have an 87 laying around.
The question that I have is which wire is the tach trigger? I have 2 wires that go to the DME, so one has to be it right? BLK or BLK/VIO 
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12-20-2014, 07:13 PM
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Registered User
Join Date: Oct 2010
Location: Southern NH
Posts: 3,553
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Pic is of 84, but the wires are the same color on the 87
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12-20-2014, 07:16 PM
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Turbofrog
Join Date: Aug 2009
Location: Europe
Posts: 1,677
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Dunno but on my 79 its black violet
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************************************************** ******************************* 10/78 930: HX40Super, MS3pro+IDX1050+044+E85, ITB, 12 Denso COPs, TrueSplit-BB/2*38WGs, Weight<1100kg |
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12-21-2014, 03:35 AM
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Registered User
Join Date: Oct 2010
Location: Southern NH
Posts: 3,553
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Thanks, I would assume it's uniform through out the years!!
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12-21-2014, 04:44 AM
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Registered
Join Date: Jul 2006
Location: S. Florida
Posts: 7,249
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The skinny black violet wire is the tach trigger wire. It's in the 6 pin plug on the CD unit too.
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12-21-2014, 07:20 AM
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Registered User
Join Date: Oct 2010
Location: Southern NH
Posts: 3,553
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perfect, thanks gentlemen
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12-21-2014, 02:08 PM
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