Normally airbags (SRS systems) don't have sensors in the bumpers, that's not to say they cant have just that its not normal, then again what's normal in a Morgan ;-). Somewhere in the system is a crash sensor, its an aluminium box (think small ECU as that's what they are) that measures retardation and impact, if parameters are met the bag deploys. Finding the crash sensor will be fun, normally mounted low in a car and central, under seats or around transmission tunnels, just look for wiring going to the bumpers or mounting irons. Since 1990 SRS wiring should be colour coded Orange.....again what should be and what Morgan do may not be the same but it might give you a heads up.
