2002 Tahoe - No power to the OBD-2 - blown fuse? - Chevrolet Forum - Chevy Enthusiasts Forums

Go Back   > >
Log In 

Tahoe & Suburban The power, space, and brutal towing ability make the Tahoe and its longer sibling, the Suburban, arguably the best full size SUV's on the market today.

2013 Chevrolet Suburban
Platform: GMT 400, 800, 900

LinkBack Thread Tools Search this Thread
Old 05-13-2010, 12:20 PM
CF Beginner
Thread Starter
Join Date: Jul 2009
Posts: 13
Default 2002 Tahoe - No power to the OBD-2 - blown fuse?


Recently my "Service Engine Soon" light came on. The vehicle appears to still be running fine, although I must admit I have noticed a significant increase in fuel consumption over the past months.

My brother-in-law went to Autozone to use their scanner [he has done this many many times on his various vehicles] and when he attempted to use the scanner to determine what codes were showing up, apparently there was no power to the diagnostics port.

An Autozone guy was helping him with it and the Autozone guy tried numerous times and also noted that there was no power to the OBD-2 port. He suggested to my brother-in-law that it was probably a blown fuse.

Can anybody tell me what fuse on a 2002 Tahoe handles the OBD-2 power?

Something I should mention is that at some point early on my brother-in-law installed a remote start unit to my Tahoe. Last year we removed that after I had other problems. ( This remote start unit was talked about in another thread I posted some time ago... http://www.chevroletforum.com/forum/...ad.php?t=24401 -- thanks to the guys who provided me with the solution!) I'm not sure what he happened to tap into as far as wiring when he had originally installed the remote start unit. It's possible that if he tapped into some wire that also uses the same power as the diag port, then perhaps I have a shorting wire somewhere that caused the fuse to blow [I'm assuming that the fuse is blown].

But before I proceed further, I'd like to know what fuse would likely be the culprit fuse if a fuse were blown, so I can work on that as the same time I attempt to track down the wiring to make sure there are no shorts.


Reply With Quote
Old 05-13-2010, 09:22 PM
MDTAHOE's Avatar
Super Moderator
Professional Mechanic
Join Date: Nov 2008
Location: Bowie, MD
Posts: 2,955

15 amp fuse under the hood labeled "CIGAR"
Reply With Quote
Old 05-13-2010, 09:28 PM
CF Beginner
Thread Starter
Join Date: Jul 2009
Posts: 13

Thank you!

Reply With Quote
Old 05-13-2010, 09:51 PM
CF Beginner
Thread Starter
Join Date: Jul 2009
Posts: 13

I pulled that fuse, and it definitely was blown. I also realize fuses don't blow for no reason at all. I'll pick up another one tomorrow for it. I'll look over the wiring where the old remote start had been patched into things under the dash, replace the fuse, and then hope for the best. Hopefully I'll be able to then see what's going on with the Service Engine Soon via the diag port.

I really appreciate your help! Thanks again.

Reply With Quote
Old 05-17-2015, 01:53 PM
CF Beginner
Join Date: May 2015
Posts: 1

Along these lines, checking fuses, with everything in place, can anyone think why after installing a new fuel pump, all of the gauges don't work unless you plug in an OBD reader?
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
04 Malibu Maxx interior light fuse blown 2004CMM Malibu 1 07-27-2009 05:27 PM
2002 blown Fuel Pump fuse cablegod2530 Malibu 0 07-18-2009 06:38 PM
blown ECM B fuse oopsagain Silverado & Fullsize Pick-ups 1 02-13-2009 10:18 PM
2000 Silverado Blown ECM Fuse/Dealer wants $980.00 Spudweiser Silverado & Fullsize Pick-ups 3 08-08-2006 12:33 AM
ECM-B fuse blown MotorMadness General Tech 1 07-25-2006 04:00 AM

1500, 2002, chevrolet, connector, equinox, equnox, fuse, ii, obd, obd2, pickup, port, power, suburban, tahoe

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -5. The time now is 06:08 AM.