I dunno if this is the same as on a 126, but you can pull off the fuel system relay pretty easy on a 126. Not going to get anywhere without that.

If you want to have some fun with the little bugger, put a time delay relay on something critical such as the fuel pump along with a hidden bypass switch. Without the bypass switch engaged, the fuel pump cuts out after 60 seconds leaving the would be thief half a block down the road and stalled. Imagine the panic!

They used to make those back in the 70s, they called it a "steal 'n stall"


Have fun!