A Mechanic reports he turned a Cessna 182's Master Switch 'On' after inadvertently attaching the aircraft's main battery connection leads to the wrong terminals of the main battery. The reversed polarity flowing through the Cessna's electrical systems destroyed several electrical sub-systems.

Narrative

The main aircraft battery connection leads were connected to the wrong terminals of the aircraft main battery. The master switch was then turned 'on;' followed by moving the gear position lever into the 'up' position. The reversed polarity flowing through the aircraft's electrical systems destroyed several electrical subsystems. Including: fuel gauge; aircraft clock; turn coordinator autopilot output; voltage regulator; and landing gear hydraulic pump electrical components. The Technician had a feeling something was wrong; but did not identify the problem until circuit breakers started tripping. Technician had taken a second look before the master switch was activated but failed to seek a third check or another Technician's review of work done. These actions were omitted because the Technician felt the additional activity would be viewed by his employer as a waste of time; and was feeling pressure to 'get the job done.' Future corrective actions include: temporary marking applied to the aircraft wiring to indicate positive lead. Temporary insulation and marking installed on the aircraft battery positive terminal while battery is out of service; that must be removed before Technician can attach the aircraft wiring. Taking the time to seek another technicians review of work performed.