When the anti-theft light is flashing rapidly then either it is not seeing the key,or the transciever module is not communicating with the PCM. It could be the transciever or it could be the PCM is not powering up for some reason. I would first try replacing the PCM relay in the underhood fuse panel.
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I replaced the relay the first time it wouldn't start.It made no difference.I checked all fuses and my mechanic buddy checked out the fuse panel and PDB with a multi meter.All checked out ok.Is there a way to test the transceiver so I can eliminate it or condemn it as a problem? I unhooked my battery,unhooked the harness from the PCM,rehooked up the battery and tried the key again.Same thing,1:6 code.It's as if the PCM isn't there at all.Can I test the PCM away from the truck(isolated)? Does the transceiver communicate directly with the PCM,or does the signal go to another relay or PATS module? Thanks for your help,I most certainly appreciate it...
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