Diagram | 2015 Peterbilt 389 Fuse Panel

If you own or drive a 2015 Peterbilt 389, you already know that electrical issues can bring a haul to a halt fast. Whether it’s your headlights, turn signals, HVAC blower, or power ports—knowing exactly which fuse to check is critical.

| Fuse # | Amp | Circuit | |--------|-----|-----------------------------| | F12 | 10A | Turn Signals / Hazard | | F18 | 15A | Cigarette Lighter / Power Port | | F22 | 5A | Instrument Cluster | | F30 | 20A | Windshield Wipers | | F40 | 10A | HVAC Control Head | 2015 Peterbilt 389 Fuse Panel Diagram

🔧 Tip: Always use a test light—don’t guess and pull fuses blind. If you own or drive a 2015 Peterbilt

The 2015 model year uses blade-type fuses (mini and ATO). Always replace with the same amperage. The 2015 model year uses blade-type fuses (mini and ATO)