When you set the alarm with the remote do you get 2 beeps?
I fitted tracker alarms in bailey vans for years, I can assure you PIR sensors were never ever hard wired they were only ever powered by battery, also a tracker alarm was never fitted so as to turn on the awning light, so if it is a tracker system it hasn’t been fitted as it should have been so it’s either been fitted wrongly/not a tracker alarm at all or it’s been butchered and altered in how it’s been fitted, also any fuses near the siren as mentioned by a previous reply they also are nothing to do with a tracker system, if you post a picture of the remote or the PIR I’ll tell you if it’s a tracker system or not.
BP