I have a FXLight (initially disabled) that is enabled by a Pull Bar running a DefaultEnableDisableLinkedRef script and this works fine but I want it to also Enable a Sound Marker. I've tested the sound marker on its own with a pull bar and its fine too. I tried LinkedRef from FXLight to Sound Marker hoping the pull bar would turn on the light and the light would turn on the sound - doesn't work. I tried using EnableParent of the sound marker as the light, i can't select the light in the render window as either a EnableParent or an ActivateParent. There must be a simple way to connect the 2 so they both enable with 1 Action (pull bar, trigger box, etc) otherwise I need a rethink of how I am going to deal with this.
Thanks for any advice.

Not sure if this would work, but for vanilla houses they have a xmarker which is linked to the furniture. And when you purchase something it enables the xmarker. I would take a look at Breezehome and see how they did that, it's a little different because you are using a pull bar but it could help.