Access the panel with circuit protectors positioned under the hood and beneath the dashboard to identify each element by amperage and function. For this Wrangler JK generation, the under-hood module (often called the power distribution center) contains high-current inserts rated from 20A to 60A that serve systems like the radiator fan, ABS pump, and starter relay. Inside the cabin, a secondary panel holds low-amperage inserts, typically 5A–25A, assigned to interior lighting, infotainment, and auxiliary sockets.
Use the cover label or service manual to match each slot with its circuit. For example, the radio circuit is usually protected by a 15A insert, while the HVAC blower often relies on a 40A high-current link in the engine compartment. Always confirm ratings before replacement: installing a higher value risks overheating wires, while a lower value may cause repeated shutdowns. Keep spare inserts of common ratings (10A, 15A, 20A) in the glove compartment for quick roadside fixes.
Corrosion or loose contacts inside the panel can interrupt power flow even when the insert appears intact. Inspect terminals for discoloration or oxidation, especially after exposure to moisture or off-road conditions. A multimeter set to continuity mode provides a reliable check: remove the insert and test across its terminals; a lack of signal indicates a break. Re-seat components firmly to restore stable contact and prevent intermittent electrical faults.
For modifications such as auxiliary lighting or winches, avoid tapping into existing slots without load calculation. Add a dedicated relay and inline protective element rated according to the accessory’s current draw. This approach prevents overload on factory circuits and maintains the integrity of the vehicle’s electrical network.
Wrangler JK Power Distribution Layout: Practical Guide for Owners
Check the power distribution center under the hood first and match each slot with the printed legend on the cover; if the lid is missing, use a verified wiring chart specific to the mid-decade Wrangler JK to identify circuits before removing any element.
The under-hood module sits near the battery and contains high-amperage links for starter, cooling fan, ABS, and lighting. Inside the cabin, a secondary panel behind the glove compartment handles lower-load circuits such as radio, interior lights, and accessory ports. Use a puller tool to avoid damaging terminals, and always compare amperage ratings stamped on each piece before replacement; installing a higher rating risks wiring damage.
Typical Circuit Assignments
- Cooling fan: 40–60A link in the engine bay module
- Headlamps: paired relays with 20–30A protection
- ABS system: dedicated high-load slot near main feed
- Infotainment and 12V outlet: 10–20A in the cabin panel
- Wipers and washer pump: mid-range protection, usually 20A
Quick Troubleshooting Steps
- Switch ignition off and disconnect the negative battery terminal.
- Locate the suspected circuit via the lid legend or a trusted wiring chart.
- Inspect the metal strip inside each component; a break indicates failure.
- Replace only with identical amperage and type (mini, micro, or cartridge).
- Reconnect the battery and verify operation; if failure repeats, trace wiring or relays.
Where to Locate Each Fuse Box in a 2015 Jeep JK and Access Them Safely
Open the hood and check the power distribution center on the right side near the battery; this is the primary location for high-current circuits like cooling fans and ABS. A second panel sits inside the cabin, behind the glove compartment–press the side tabs inward to lower it and reveal the interior circuit panel. Some trims also include a small auxiliary unit under the dashboard on the driver’s side, close to the steering column, used for lower-load electronics such as lighting and infotainment.
Before accessing any of these panels, disconnect the negative battery terminal using a 10mm wrench to eliminate live current. Use a plastic trim tool instead of a screwdriver to avoid cracking clips or scratching surrounding surfaces. Under-hood covers typically snap off with firm upward pressure; inside, expect tighter clearances–tilt the glove compartment fully down to avoid stressing hinges. Keep a flashlight ready, as markings on covers can be faint and positioned at awkward angles.
After opening each panel, inspect the layout printed on the inside of the cover or molded into the plastic; match component labels precisely rather than relying on position alone, since layouts vary by equipment package. When removing a blown unit, use the dedicated puller usually clipped inside the cover, grip straight, and avoid twisting to prevent bending contacts. Replace only with identical amperage–mixing ratings can lead to wiring damage or intermittent faults. Re-seat covers firmly until all clips engage, then reconnect the battery and verify operation of affected systems one by one.