2003 Cadillac CTS TRUNK

You can check for a signal at the release solenoid with a test light. If the relay is sending, it is power on tan/white pin A, and it is grounded on pin B(g402). It is direct from the relay to the actuator.

In this case, the latch and actuator are the same. Like I say, from the relay, power goes to Pin A of the latch(actuator) on a tan/white wire, Pin B is a black wire that grounds. You can check it by bridging Pins A and B with a test light. If you have no light, substitute pin B with a good chassis ground. If you still have no light, then it is almost certain you have no power. Often times, there are other relays in the same panel that are the same. Try swapping it with another relay in the panel, and see if it works.

You could have an issue with the fuse block, or an open circuit 56 which is the tan/white wire that is direct from relay to actuator Pin A. The schematic is calling it r33 at the relay, I don't know how they are labeled, or if the are. With the actuator disconnected, and the relay out, you can measure resistance of that circuit by probing Pin A at actuator, and probing the relay terminals. If you don't have continuity on any, it may be open. Or you can go to the back of the fuse block, and determine which is the correct terminal. The control side, and the switch side of the relay share the same power feed which is jointly connected within the fuse block. Check with a test light that there is two powers at the relay pins r31 and r32. If there is not two powers, you could have an issue with the fuse block.