Welcome to the Forum again, glad it worked out for you.
The search bar in the upper right corner can be your friend, this site has most everything somewhere.
Take a look at
http://www.smokingmeatforums.com/t/90007/cajun-injector-electric-smoker for a starting point.
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Electric smokers, especially older ones are pretty simple, and if the box, door, and racks are intact should work well for years. Electrical components are power cord, thermostatic control, and heating element and usually fairly easy and inexpensive to replace. There are several methods of generating smoke in different brands. My Smoke-it brand just has a tray that fits around the heating element that I put a couple small chunks in, nothing mechanical or separate, works very well for me. I usually do not use a water pan, sometimes foil if the humidity is very low.
As an old electrician, shocking from anywhere is not normal or desired, as you probably know.. You should use a three prong grounded outlet, and try to not use an extension cord if you can. If you have to use an extension cord, get the shortest three wire cord you can with preferably number 12 gauge wire.
You have not filled out a profile, so we have no idea what your ambient temperature might have been during your smoke. All smokers especially electrics have a limit especially if it is windy. Mine is in a semi protected wind area, and will hold 225' through at least a 10'F night.
I would suspect there are some others here that might have your particular smoker that have made posts in the past that might help. If you still have questions, you might need to start a new thread addressing needing additional help on that particular smoker.
Sounds like you need to smoke more for practice, Ha Ha Good luck to you.