Do you have one of these in your collection? I do. I found mine at a flea market for $35.00 The guy I bought it from said the light and the tire pressure thing did not work, but what the hey! The fuse puller and the scraper were in excellent shape so why not?
So home with it it needed a new N90 battery. Got that in and the light sort of worked. I can (flll in your favorite thing here) harder than that light is shining. I took into a dark room for the test. I could not see worth a darn time to upgrade this thing.
Time to get creative. ON the back of the battery cover it gives a number for a bulb, but try to find that on line? Forget it. So the next thing to get the lens cover off. It has like a watch on the back, things to grip and turn. Looking inside I could see where the tab was, and where it had to go. Tried to turn it. Tight. Next? I can see the end of the tab, perhaps a little persuasion from a pocket screwdriver would help. Got that behind where the tab ended and pried easily. It moved. Now to move it to the "open" position. That done, the lens cover is still tight. Another little persuasion by a SAK blade and it starts to come off.
Now with the bulb in sight, I have to look carefully t it to try to determine what kid of bulb it actually is. With a visor magnifier on I can see more than I need to know. It is just a standard bi-pin flashlight bulb. Like a Solitaire. MY mind went to work.
I have spare bulbs for my single cell MAG lights in an LED -- why not? Carefully I pulled the old bulb and it came out. Noticed which side of the connections went to + and - and inserted the LED. Put in the battery, pushed the switch ..... The result ...
The old bulb is seen on the table and the new bulb is seen in my spare -- find them on E-bay looking for MAG LITE single cell LED's.
The lens cover may not go all the way back on, but it is tight enough to hold it in place. Maybe later I will try a model railroad 1.5v LED with out the base on it -- but for now it works fine.
Now the tire pressure thing suddenly decided to work. IF that dies, there is a small screw on the top. Somebody said that taking the screw out does nothing. If mine dies, NOTHING IS SAILOR PROOF! Will keep you informed in case I ever need to get that far.
My impression of this tool is that it will do what it is supposed to do. Namely be handy for anything which needs fixing. Not that you are going to do a major overhaul with thing, but to change a fuse, or clean off light frost, or check your tires when that damn "check tire pressure" light comes on ... Or any other small item this tool will work. LIKE taking a tail light off to change the bulb. Your only limit is your imagination.
The Aerojet