Cummins Fan Clutch Fuse

I walk you through step by step how to replace the fan clutch on an 07 dodge cummins 5 9l.

Cummins fan clutch fuse. The fan clutch is an electronically controlled part that attaches to the fan on the front of your motor and causes air to be forced into the cummins a c system. Fan relay is located under the fuse box driver side under the hood. Step 1 open the hood of the vehicle. Remove the fuse box and u will find the relays under.

They even cheeper less than 20 bucks. But there is a fan switch for the fan between the relay and the fan. Dodge diesels are fitted with an electronic viscous fan clutch which is electrically activated by the ecu when the engine temperature reaches high temperature or the air conditioning head pressure reaches 240 to 270 lbs. Both are circled in red.

My rig is 2008 discovery 39r 350hp cummins motor. Fuse 15 for the fan clutch has been pulled now replaced with a switch and relay 10 is the one immediately to the left. Probably fan clutch. There are a few simple ways to test the fan clutch as make sure that it is functioning properly.

There is a known issue with the electronic fan clutch and many mentions of a service bulletin. You may have codes p2509 and or p0483. Electric viscous fan clutches in 2003 09 5 9l dodge ram diesel 6 7l diesel.