[Shotimes] 91 with intermittent airbag light, blinking 6

[van Oss]

My 91 winter SHO occassionally shows a blinking airbag light.  Happens every
3-4 weeks, might be related to extremely low temps.  (Work with me here,
George.)  Get out to run an errand, restart the car, no light.

When it's on, it blinks 6 times ... pause ... 6 blinks ... pause ... 6
blinks ...   Is my 91 SHO the Beast, the Antichrist?

Anybody have a Gen1 Shop manual to look this up?  My 92 shop manual doesn't
list any airbag codes that look like this.  Thanks.

Joseph van Oss