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Hello all i am new to installs with tacho's i have been looking on the net for about 2 days now trying to figure out were my Signal wire is for my tacho i know i am runing a pro f-con ecu it looks to piggy back off the orignal ecu. i am just con fused on were to splice in to ? i am pretty certain this is the wireing dirgram for my Ecu (Link) > http://1jzmerc.com/hks-faq/hardware/ i have been told to splice in to pin 8 but i am still not 100% just need some help if possible thanks .

Photos will be posted on request if needed thanks again

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