I have a 90 2200 pu, check engine light is on and have been told to get codes by counting flashes of said light, how do i get this to happen? I have a hayes manual but I can find no reference to this subject. pls advise, thanks

 

I know what your talking about, I was shown how to do it but I am still a little fuzzy on the details all I do know is that you get some kind of wire or conectors that can be conect on that little turmale under your stearing wheel I think. Um had to say because I was shown so long ago. I know how to do it on my 323 but I am not sure on that on. I'll look it up and see if I can find some more info for yah.


I think I know how to do it I just need to tell you where to do this at.


I'll get back to you on it.

 

Under the hood at the passenger rear corner you want to find a Green colored one pin connector. Short this wire to ground and turn the key to 'RUN' position. The MIL should start flashing a one or two digit code. A code 09 would be 9 short flashes followed by a 4 sec pause and then will repeat. If a two digit code then the first series of long flashes will be the first digit and second set of short flashes would be the second digit (ie 3 long flashes followed by 4 short would be a code 34 ). How many miles are on your truck? There is also a maintenance reminder that turns on the MIL every 60k and 80k miles. You will not be able to output any codes if reminder switch has been tripped.

 

Thanks for the tech. help guys! There are approx. 100k miles on truck, also , it is a 91 not a 90. THX. again

 

90 and 91 would be same place for check connector and same codes as well.