vpc wiring question have searched got two answers

[koreyd]

i am trying to hardwire my vpc into my 91 na-t
the problem is i am not sure wheter to use the grey or yellow wire for the afm signal
i believe that it is the yellow wire for mkiv and grey for mkiii
could someone please straight this out for me
thanks

 

[jdub]

http://oldschool.supracentral.com/htm/vpc.htm

 

[koreyd]

thanks for the instructions
i already have them i do not have a feilds harness
on the nine pin connector i have a grey wire and a yellow wire
reading the posts i have found that some people use the grey some use the yellow
i just need to know which one to hook up