× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Re: 04 F650 Brake light
Posted to HD/Fleet Forum on 4/13/2020

I’ve seen this several times. The differential “needle” has been sitting in one spot for years. When a pressure drop causes it to move it sticks in position. Usually have to replace the master. Login to read more.