Get a PDF version. You can print specific circuits (e.g., just the engine control circuit) and take it to the garage without ruining the whole manual.
Often released for specific model years (like 2001), these manuals provide a broad overview of electrical sections like the fuel and emission control systems, body electrical, and heater/AC systems. Workshop Manual Supplements: mazda premacy wiring diagram
Powertrain Control Module (PCM) , ABS sensors, and airbag modules. Get a PDF version
