: Check the area between the battery box and the Electronic Control Module (ECM). There are often in-line fuse holders
If you don't have a diagram, turn the ignition ON and use a voltage tester on both sides of every fuse. If power is present on only one side, the fuse is blown. 1994 freightliner fl80 fuse box diagram
Pull the fuse using a fuse puller tool. Look for a broken metal filament inside the plastic housing. : Check the area between the battery box
: The main box for early models (1993–1995) is often found on the right side of the engine compartment Battery/Chassis Area Pull the fuse using a fuse puller tool
If the sticker is missing from your truck, here is the "Solid" method to identify your circuits without a manual:
Look for in-line fuse holders or secondary breakers near the batteries that provide constant power to the ECM or transmission controllers.
"Come on, old girl," he muttered, tapping the plastic housing.