3176 DIESEL TRUCK ENGINE OEM SYSTEMS Caterpillar

A "single" winding (single output) magnetic pickup sensor is recommended for use as a vehicle speed sensor for the 3176 system. Experience has shown that use of a "dual" winding (dual output) vehicle speed sensor can contribute to electrical noise problems. Refer to the 3176 System Wiring Schematic section in this module for recommended wiring of the vehicle speed sensor, vehicle speed buffer and speedometer. Grounding the vehicle speed buffer and speedometer at the same location is required.