The OBD port is on the same fuse as the cig lighter. Also the fuel gauge reading empty all the time is probly the cluster. There are several people on ebay that will fix the one you have and send it back.
for the fuel gauge that could be a few things, broken wire,bad connections,sending unit ect. on my buddies 03 his fuel gauge quit working and it was the gauge cluster and had to replace it. i also had to replace mine but mine was for the speedo. they are another problem that the 03's had because the brushes wear out
hmm... Is there any link between the fuel gauge and the port/programmer not responding? I read another forum that stated that the gauge worked off the ecm... Not sure though. I figured it would be the sending unit
on the obd port-What fuse is the lighter on? Aux? I looked through everyone almost and had no luck. What else could it be??
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