Installing a fan override switch to manually turn the This will allow you to run the fan with the engine turned off for maximum cooling. Note though that you may want to install a volt gauge so you can keep an eye on the status of your battery. Wiring Diagram. This is the diagram for what we're doing here. The parts in black are the stock wiring for the cooling fan. 99 Freightliner problems | Expedite Trucking Forums Jan 22, 2010Like I said earlier when u start the truck the fan is running, if it's really cold out & the truck goes though its automated warmup procedue which is the engine reving at 1100 rpms from any where to a few seconds to 10 mins, you will hear the fan, it will run for about a minute and shut off. You can't miss it it sounds like a huge fan running. Freightliner Wiring Diagrams or Repair Manuals | The May 12, 2018Access Freightliner is no longer around. It was replaced by DTNA earlier this year. Gives you wiring diagrams, parts listing by vin and also access to the engine manuals. Engine fan stays on - Trucker Forum - Trucking & Driving Feb 01, 2009Engine fan stays on Freightliner century class engine fan stays on all the time. When ignition is turned on, the screen in dash will show active fault. " Related searches for freightliner engine fan wiring freightliner engine diagramfree freightliner wiring diagrams2014 freightliner wiring diagramfreightliner classic wiring diagram2004 freightliner wiring schematicfreightliner wiring diagrams pdffreightliner electrical wiring diagramsfreightliner trucks engines