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930 porsche 930 porsche is offline
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Join Date: Jul 2009
Location: Naples
Posts: 141
Tach not responding

On my 1978 930, my tach quit a few months ago and my mechanic try troubleshooting and could not find the problem. He then hooked up a white wire with the BLK/Purple wire and worked fine since but I do not know what the white wire is for and also i rather find the problem and get the BLK/Purple working properly without depending on connecting other wire to it. What are the steps for me to do in order of getting this tach working again. I need education of where it is getting its power and how does it respond. A wiring diagram from the acual back of the tach connections to the ICU will be really helpful.
Old 08-03-2009, 06:54 AM
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