Hallo
I am new here and I have a big problem.

I installed a GPS-Navigation sys. (VDO-Philips Carin 522) in to my car (3.Gen. Firebird '91 3,1l V6).

Everything OK
but I need Speed Signal contact from Tacho to Navi.

But I don't know which wire is it or which color has this wire who comes in to Tacho from ECM.

I have to connect wire to GPS-Navi but can not find.

Please help me
Cheers Aykut


PS. Sorry for my English

 

if you get a spec sheet for your car, there is a VSS wire at the computer, if i remember correctly.

you dont use the tach wire.