The electric trunk lock on my 03 Opel Vectra is not working. I removed the panel covering the back of the trunk and took apart the mechanical lock and the electric solenoid. Nothing is stuck. There are 2 wires that plug into the solenoid. I connected my meter to the wires and activated the remote. I was expecting to see some voltage, but there was nothing.

So, I now suspect that whatever sends the voltage to this solenoid is not doing it. What would that be? Where? Is this something that will show up as an error code?

While I had stuff open at the back I found a radio rcvr near the right rear tail light. I thought it was the rcvr for the remote control, but the remote still operated the doors etc even with this rcvr disconnected. So, what else could this be?