× 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: 2001 Cummins ISB: DTC P1688
Posted to HD/Fleet Forum on 4/22/2007

Jeff,

Remove the short rubber line between the filter and the injection pump. Hook a hose on the line from the filter and stick it into a 2 qt. or larger container. Bump the starter without starting the engine, this will turn the transfer pump on for 25 seco... Login to read more.