2024 Kenworth T680 Fuse Box Diagram & Amperage

Quick answer

The 2024 Kenworth T680 typically features fuse box locations in the following areas:

• Under-hood: On the passenger side, often near the firewall, containing fuses and relays for major engine and accessory circuits.
• Dashboard Kick-Panel/Interior: Located on the passenger side kick-panel, this box handles various cabin electronics and accessories.
• Battery Box/Frame Rail (Chassis Fuses): Depending on the configuration, certain high-amperage fuses and circuit breakers related to the battery and main power distribution may be found in or near the battery box on the frame rail.

Under-Hood Fuse Box

This fuse box is usually located on the passenger side of the engine compartment, often towards the firewall. It houses fuses and relays for critical engine functions, lighting, and other high-demand systems. Always refer to the diagram on the fuse box lid for the exact layout specific to your vehicle's trim and options.

Relay Locations (Under-Hood - Common):

• RL1: ECM/Ignition Relay
• RL2: Fuel Pump Relay
• RL3: Starter Relay
• RL4: Headlight High Beam Relay
• RL5: Blower Motor Relay
• RL6: A/C Clutch Relay
• RL7: Trailer ABS Relay
• RL8: Horn Relay

Dashboard Kick-Panel / Interior Fuse Box

This fuse box is typically located on the passenger side kick-panel or behind a removable access panel in the dashboard. It manages power for interior accessories, convenience features, and some communication systems. Again, verify with the label inside your fuse box cover.

Battery Box / Frame Rail Fuses (Chassis Fuses)

For heavy-duty trucks like the Kenworth T680, some larger fuses or circuit breakers for primary power distribution and chassis-mounted accessories, including those for the trailer, are often located near the battery box on the frame rail. These are typically high-amp fuses or resettable circuit breakers. Always use caution when working near the battery.

Note: The actual fuse numbers might vary. Always consult the specific diagram printed on your fuse box cover or your owner's manual for accurate identification.

How to Test a Fuse

Testing a fuse is a straightforward process and requires a simple tool: a multimeter or a dedicated fuse tester. Here's how to do it:

1. Safety First: Ensure the ignition is off and the circuit you're testing is de-energized to prevent accidental shorts or injury.
2. Locate the Fuse: Refer to the fuse box diagram to identify the fuse you suspect is blown.
3. Visual Inspection: Many fuses have a visible wire element inside. If this wire is broken or charred, the fuse is blown. However, not all blown fuses are visually obvious.
4. Remove the Fuse: Use a fuse puller (usually found in the fuse box or tool kit) or small needle-nose pliers to gently remove the fuse straight out of its slot.
5. Use a Multimeter (Continuity Test):
   • Set your multimeter to the