Tachometer wire test?? Aftermarket tach install

gotboostsc

SCCoA Member
I want to install an aftermarket tachometer by autometer. some one had told me that there is some kind of tachometer wire test in the rear of the left side of the engine. The only way for the tach to work is through this. I cant find it though. If anyone has installed a tach before and has some pointers or tips for me please reply to this post. Thanks.
 
My 90 EVTM shows the tach test connector located right where the DIS module is mounted. It's a connector with what looks like a jumper plug inserted. The wire that is jumped is yellow with a light green stripe.

I hope this helps some.

A great week all.
 
Thanks a lot I am trying to get it done before carlisle and I couldnt find that wire. I will look for it tonight thanks for the help.
 
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