Hi,

I feel dumb for asking this question but for the life of me I cannot find the answer to my question through the advanced search. I know you connect the output of the Tacho signal from the ECU to the Yellow/Blue wire located on the stock harness. But I clearly remember there was a ground wire that had to be reconnected to a ground post. What wire is that ground wire on the stock harness?

Thanks,

Shawn

 

https://www.rx7club.com/interior-ext...epair-1055763/

 

that was the thicker (maybe 12-14ga) black wire in the white plug behind the AC evaporator box, if i recall correctly.