Quote Originally Posted by jerry598 View Post
It's been a long time now since my last post, like many years I think. Tried to pull codes on my 1995 6.5TD K3500 using the old paper clip method by shorting the top 2 RH pins on the dlc. Dash light will not flash anything at all. How can I check power to the obd1 dlc? Not sure which pin is the 12V. The upper Right?
The GMTD Scan software will make this a moot point, but I'm curious what method you're using to get codes using a paperclip - i.e. key ON.