Expert
Posts: 5870
![5000](https://horsetrailerworld.com/forum/images/decorations/multiple/5000.gif) ![500](https://horsetrailerworld.com/forum/images/decorations/multiple/500.gif) ![100](https://horsetrailerworld.com/forum/images/decorations/multiple/100.gif) ![100](https://horsetrailerworld.com/forum/images/decorations/multiple/100.gif) ![100](https://horsetrailerworld.com/forum/images/decorations/multiple/100.gif) ![25](https://horsetrailerworld.com/forum/images/decorations/multiple/25.gif) ![25](https://horsetrailerworld.com/forum/images/decorations/multiple/25.gif) Location: western PA | Most trucks have an aux circuit that powers the interior lights separately from the running lights. If this fuse is blown, you won't have this circuit available. On Ford SDs, it is in the engine compartment above the drivers feet in a small fuse box. Also, with the SD diesels, the engine has to be running for the circuit to be powered. Gard |