The CAT 97C54‑22100 Accelerater Switch is the primary throttle control module used in Caterpillar lift trucks and forklifts, converting operator input into drive signals for the motor controller. Common failure modes for this class of electronic switches include burned or tripped relays, failed contactors, degraded capacitors, and shorted signal lines due to vibration or moisture ingress. Initial checks should verify that the unit receives proper 24 V DC power from the forklift’s battery system, inspect all connectors for corrosion or loose pins, and test the switch’s output signals with a multimeter or oscilloscope while cycling the accelerator lever; also review any stored diagnostic codes in the truck’s control panel.[oss-gpt-20b]