TABBED 5.3

iTrader: (1)

What would cause my diagnostic port to not work. SES light came on recently, and when I hook up my scanner, the scanner does not come on. However, it sounds like the fuel pump is priming while it is plugged in. The car is a 96 OBD 2, and has a mail order tune. Also I have checked all the fuses. any suggestions?

RamAir95TA

iTrader: (2)

Do you have the correct cable and software?

TABBED 5.3

iTrader: (1)

As far as I know, I'm using a regular OBD2 scanner, I know it works, because I tested it in my truck.

RamAir95TA

iTrader: (2)

This might sound silly, but perhaps the DTC you're getting is FOR the diagnostic port.

Sorry I don't have much more to add, being that I'm OBDI.

bombebomb

This is a shot in the dark and since you said the fuel pump is priming I am going to guess this will not be helpful. Anyways, does the key have to be turned on?

shbox

Make sure your cigarette lighter fuse is good. It also provides power to the DLC, pin 16.

doug1105

just a thought- maybe check the pins on the scanner plug to make sure none are bent.

explicit.muscle

iTrader: (1)

I had the same problem, and it ended up being the ground wire that hooks on to the coil bolts that was left off.

shbox

I another forum, I think he found the answer was the fuse.

TABBED 5.3

iTrader: (1)

yep, it was the fuse. Me being the jackass that I am did not realize it was the same fuse as the cig. lighter. thanks to everyone who replied / helped in this thread.