SES light

[TheWhiteWolf]

Well, after a week of my temp rising to 3/4 one day, staying at 1/4 another, I decided to check for any codes that may have some how come up when I wasn't looking and check to see if the fan worked.

It’s a '94 3100 w/ Auto.  I have never noticed the SES light come on while driving.  

I put the jumper in and.......................... nothing, SES light stays on, fan don't turn on; get no action from the test terminal.

A couple Questions,
1- I am going to test for continuity on the test terminal and the ground to make sure that’s not the problem but I need to know where the diagnostic (B) terminal leads to so I can test it.    
2- Has anyone had an issue like this with the light staying on while checking for codes?

[MAD MARK]

Yes both in 94 and 95 the jumper way will not work as they are OBD 1.5 meaning that you have to have a SuperScanner CP9145 or better to read codes. That scanner is made by Actron and help can be found here.

Actron Website FAQs

I found out that the local Advance Auto uses a CP9140 leaving you to either buy a scanner or go to the dealer.

[1988GTU]

94-95 cannot be tested like the older obd ones.   Search and you'll find out why.

[MAD MARK]

(1988GTU @ Mar. 24 2006,16:26)Q
U
O
T
E94-95 cannot be tested like the older obd ones.   Search and you'll find out why.
I just told him why...

[1988GTU]

You happen to see the time I posted?
I type slow...  SORRY!