Check the PSE module under the rear seat, next to the battery, for water contamination.

 

There doesn't appear to be any water damage. Also, the tow toggle switch red light is not blinking properly with ignition off. Is kind of fizzing

 

You need to remove the foam pieces covering the PSE and check the bottom of the PSE for wetness. You may have to remove it to check the bottom and connectors. Water may have drained from the drain hole at the base metalwork, and whatever leftover dried up, But it may have done its damage to the connectors / printed circuit board for the Alarm module.

When the car is in alarm, The PSE/ATA flashes the fog lights. Also in the case of anti-tow LED, it is driven by the same module. You do not have alarm condition, if you did you could hear the alarm horn (if it still works) and the fog lights would flash. If the fog lights are on permanently, the circuit board in the PSE that drives it, is bad. The same goes for the LED.

 

Now the side markers and back lights are staying on after the ignition is turned off. What fuse is that?

 

Could be a possible bad headlight switch.

 

The alarm and headlights work just FYI. Is there a fuse for this issue? I'm having to unplug the battery when I leave the car

 

Do your hazard lights work (flash) ?

The lights you are talking about are controlled by the SAM. They do not have individual fuses.

 

Yes the hazard lights work

 

Remove power connector to the PSE module and see if the lights turn off. Connector 2 with red/white and red/green wires, brown and black wire.

Also, when you say that the alarm works, do you mean that the siren works ? or together with the sirens, do you have the side/rear/fog lights flashing ?

 

You are batting 1,000. Checked the foam block and the bottom was wet. Removed it and dried the floor. The alarm siren and lights flash. Will put fog lights fuse back in when I get home this evening.
The parking and back lights are no longer on when the ignition is off but the tow light is lit steady red all the time.

 

Ugghh now the trunk keeps popping open. This car is becoming unsafe to drive

 

And the module under the seat near the battery is making the sound by itself when the pneumatic doors lock and unlock. Clearly there is a problem with a module or connection

 

PSE module likely kaput.

 

You need to remove the PSE completely out of its location, and examine it on the desktop (connectors, printed circuit board etc.) . You need to get it completely dry, and then use electronics connector cleaner spray (CRC from WM), and let it dry. Re-install, and if you are lucky, it may work again. If not, you need a new PSE module.

Obviously the water is leaking into cavity under the rear seat. Very likely from the sunroof drain ducts. You need to address that, else the repaired / new PSE will fail again. In the meantime, install it in a thick plastic bag, so water will not seep into the bottom again.

 

For the moment the wacky light and trunk behavior has stopped. I reinserted the fog light fuse. They work properly and are not staying on after ignition is off. Tow light still steady red when driving. Perhaps PSE drying has helped. I will try to remove and clean it at some point this weekend

 

There is a sensor in the same area for the tow. Maybe it got wet too.

Have you tried pressing the tow switch (see below). If your tow switch sends signal to the ATA for tow condition, it would activate the alarm, Follow the deactivation sequence below.

11.0 Anti-tow protection system​	Lock vehicle. Wait approximately 15 seconds. Lift vehicle at lift point using vehicle jack, until wheel is off of ground.​	Alarm horn sounds (turn off alarm).​	23 7.0 23 9.0​
12.0 Deactivate Anti-tow protection system​	Ignition: OFF Press ATA status/towing protection switch (S85/3). Lock vehicle. Lift vehicle at lift point using vehicle jack, until wheel is off of ground. Repeat step 11.0​	ATA status indicator illuminates for 2 seconds. Alarm does not sound. Alarm horn sounds (turn off alarm).​	23 7.0​