What if both your remote lock and immobiliser don't work any more?
After checking it with a multi-meter you see there is resistance (1 à 2 ohms), but 0.000 volts. Even after applying 12V to it, still no charge. My conclusion is that the battery is simply dead after 18 years of charging.
According to Holden, to release the immobiliser, it requires a bit of a voltage in the key. So my car won't go anymore...
Holden charges $220 for a replacement key, including programming a new code in the car. A bit excessive for 15 minutes work, if you ask me.
So most locksmiths can give me a new key (immobiliser and remote locking) within the hour, for about $130?