Transmission and chassis wiring harness for heavy trucks. Runs from cab through to gearbox area and rear chassis covering all transmission sensors and chassis electrical points. Covers: gearbox speed sensor and output shaft wiring, reverse light switch, PTO engagement wiring, differential lock sensor cables, chassis ground points, ABS wheel speed connections. These get beat up under the truck from road debris, salt, mud and vibration. Common symptom is intermittent speedomete
