Parallel MOSFET safety diagnostics circuit

[artis]

I am now faced with a problem. Part of the circuit I'm making consists of a row of many parallel mosfets.
Parallel as in the drains are all tied to a rail and the sources also.
I wonder, if one of the mosfets goes bad for whatever reason , how could I be able to tell without physically taking each mosfet's drain or source off the rail?

Is it even possible to determine electronically by some clever circuit which one of many parallel mosfets is short circuited without physically taking each mosfet out and measuring?One quick thought that comes to mind is , it depends on how the mosfet fails, if it fails D-S short but gate stays unaffected then I can't imagine a way to tell apart from taking the mosfet out , but if the mosfet fails as I think they usually do with all 3 pins shorted - that is GDS all shorted then the control circuitry could determine that a particular mosfet is short between G-S.

The good news is that in my application the voltage across the fet's themselves is about the same voltage that is applied to the Gate - roughly 12 volts at max, so a shorted mosfet to it;'s gate would not cause the drive circuitry to go bad, it could sense the short between G-S.

What are your ideas?

 

[Baluncore]

What are your ideas?

Place a fuse in each drain. Place an LED and series resistor across the fuse. When a MOSFET dies, it will isolate that component, and you will see the light.