LRAYVICK Posted August 12, 2009 Report Share Posted August 12, 2009 I have an old tach I want to connect under the hood to set the idle speed prior to my smog check. I don't have a tach in the truck. I have looked over the wiring diagrams but I'm still confused. There is a round 6-port "check" connector just in front of the coolant overflow tank. It has blue, black, yellow, and brn/bk wires. Can I use any of these to connect a tach? My tach is the old style dwell/tach meter with a hot and a ground connector. The nice thing about investigating this today is I found a bad secondary coil connection which I fixed - the truck runs much better now. BTW the epnet.com wiring diagram for 86 Nissan 720 2.4 L trucks does not appear to be consistent with my wiring. (Don't know how to insert a photo of the connector or I would) Quote Link to comment
yello620 Posted August 13, 2009 Report Share Posted August 13, 2009 If i remember correctly, you can use a wire in that check connector, and i seem to remember it being the blue wire. I have been wrong before so check a couple more wiring diagrams before you go letting the smoke out of your tach or wiring harness.:D Quote Link to comment
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