Compression Ignition Addict
Join Date: Dec 2007
Thanked 249 Times in 240 Posts
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Power is in #16, Chassis Ground is #4, you should be reading battery voltage between them.
There's a pretty big difference in the electrical system between an '00 and an '03, I'm not sure but, I wouldn't do it!
If the WTS and SES work, then I think you're right, the computer Has to be running some. Something could be wrong with the reflash that's just got it confused. You've removed it?
Maybe "cold boot" the PCM by unplugging it?