OBDII Sensor not Working

**barbschwartzer** · 05-30-2012

Hi guys. I just got my OBDII reader in the mail today, and was eager to test it out. I plugged it in to my 2003 GT's OBDII port and . . . nothing. The lights on the unit didn't even light up. To check if I had just bought a knockoff Chinese piece of garbage, I tried it out on our '04 Silverado and my brother's '02 GTP. It worked like a charm both times. My research thus far has brought me to the conclusion that I have either a faulty fuse (the cig lighter one, perhaps?) or some ignition switch problem. I'm trying to find a fuse diagram and part online, and am not having any luck. Anybody had this problem? Any suggestions?

**Fivefingerdeathpunch** · 05-30-2012

open the glove box and pull the thing that covers the fuses, it should have a diagram of where each fuse is.

Then see if the cig light fuse it out.

**barbschwartzer** · 05-30-2012

It's in the glove compartment fuse box, not the under-hood?

**Fivefingerdeathpunch** · 05-30-2012

yes, a bunch of fuses are there.

**barbschwartzer** · 05-30-2012

Is that fuse for both cig lighters, or just the one right below the radio? And am I correct that that's also the one that controls power to the OBD port?

**BillBoost37** · 05-31-2012

Yes...that's what you found in your research and that's what FFDP confirmed for you. Most likely when you check it, you'll find it's bad.

Hope that helps