It feeds everything that’s 24v in the controller. If P24 reads short to ground with power off troubleshooting will be easier, otherwise you’ll have to lift wires and go through a few fuses. I would start by lifting the P24 travel cable wire and P24 to the hoistway or LN card then see if the short still exists in the controller or is in the car or hoistway. You can isolate the 188e by unplugging con9 and con11.
