Cannot use key remote

[JayUSA123]

My key remotes no longer work. I can only (un)lock the car at the door with the key. The car isn't in energy saving mode and the batteries are new. I performed the resynchronization as noted in the factory service manual (turn ignition on, turn ignition off, remove key and press unlock button within 6 seconds); however, that didn't do anything.

It's worth noting that I think the remote on one of my keys is broken, since the LED only flashes once/second and when I release the button, the LED glows dimly. But, my other key appears to be fine. The LED flashes nice and bright when I press a button (continuously for the unlock button, and pulsed flashing for the trunk, as you would expect.)

Some background:

I just replaced my immobilizer after my last one got water damaged. The old one still allowed the car to drive, but things weren't perfect: the remote range was poor, the head/tail lights didn't flash when arming the alarm system. I've been driving the car for the last year or so with the old immobilizer; however, I decided to replace it since I knew it was broken and I am also troubleshooting O2 sensor problems and wanted to eliminate variables. About a month ago, my remote range went from short to non-existent and I had to revert to the old-fashioned "key in the lock" method. I figured the receiver in the immobilizer finally bit it and was thankful that I had a new one on the way.

Fast forward to today, I replaced the immobilizer, programmed it with a PST2, transferred the remote codes from the old immobilizer to the new one and low and behold, nothing! The remotes still don't work! I tried relearning the keys into the new immobilizer manually using my key codes and still nothing. I inspected the immobilizer connector for a broken antenna wire, but everything looks okay, additionally the remote doesn't work even if I hold it right on top of the immobilizer, so I don't think it's a poor signal/range issue.

Is there anything I'm missing?

THANKS!

[JayUSA123]

An update: I think the new immobilizer might be bad. Since installing it, I've noticed that the interior lights don't seem to behave properly. When I pull the key out of the ignition, the dome light, instrument cluster lights, and door lights all go dark. Additionally, when I unlock and open the door, the lights do not illuminate; however, when I insert the key into the ignition and turn the switch to ON, the lights turn on and things start to behave normally.

Is there a setting in the immobilizer that would disable these lights without the ignition in the on position or is this type of behavior never expected?

Thanks in advance for any help illuminating this problem (no pun intended.) :)