[jamesworts]

Regarding the horn: if the problem is not in the actuating part, it must be in the sensing part, diagnose it in the column module, which from what you say seems to be the problem.

For the issue of the roof, perhaps you should study how it works and the maneuver strategies, it is IMPOSSIBLE to give you an orientation with the data you provide, determining the problem is easy if it is known the system and work on it.

Hey,
Thanks for this, 
I forgot to mention that I replaced the squib and module in one.
I now have a front SAM to try on it tomorrow.

Thanks
James