Yesterday a friend brought over his 2000 PSD. The SES light was on.
I went to pull the code(s) and received an error "No Communication link"
I then grabbed my other OBD and plugged it in and again "No Communication Link". I took both OBD readers to my 99 and plugged them in and both worked ok on my truck. Where should we start for resolving this problem?

_____
Jeff

 

This is one place to start.

 

Check fuses. I don't remember off the top of my head which fuse powers the port. It is the same as the aux power/cigarette lighter I believe.

 

^^^^^^^^ What he said!!!

I'm pretty sure that's the one! I just can't remember the number....

 

Thanks Guys....That's where we'll start......

 

Did you get fuse #3 changed out?

 

Tell me about the #3 Fuse?

 

As you look at the front of the connector, the far right pin on the bottom row is battery power. Test that pin to see if you have 12v.

 

#3 should be cigarette lighter and obd2 power

 

Got it!....Thanks guys...I'll call and see if I can get the truck over today and take a look......

Jeff