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I installed an aftermarket tachometer with the instructions posted in the diy section. The tach's light turned on but the rpms don't move. I conected the green cable of the tach to the plug of the blue cable by the battery. Do I have to take out the plug and conect it direct? or Is there another place that I can conect the green cable?

 
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dont mess with the plug on the blue wire. cut it off and splice it directly to the green wire on the tac.

 
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sorry for this dumb question but do our cars need a tach adapter to install a tach? i found a tach i liked at cardomain and it recommends that i get a tach adapter along with the product...

here's the link: http://www.cardomain.com/item/ATM3708

does anyone know?

thanks

 
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certain tachs can hook up directly to distributorless ignitions, all autometer tachs need the special adapter. it all depends on which tach you own