1995 Saturn SC2 is it possible for an electrical short to k

Electrical problem
1995 Saturn SC2 4 cyl Front Wheel Drive Automatic 122k miles

I've had electrical problems with this car since I bought it. Didn't come with the book. My rpm guage has been out since purchased and transmission has started to slip going into 2nd reverse completely went out and purchased a new battery once battery light came on. Car lost power and died shortly after the purchase. When I bought the car everything was out on the drivers side. A mechanic friend said this may all be from faulty wiring. Have tried to replace the alternator but Dont know how without taking out motor mounts. Please help.