A switch bank is the correct way to power lights, a compressor, a fridge, and accessories on a JK — one fused, relay-driven panel instead of a stack of add-a-fuse taps in the interior fuse box. An integrated system like an sPOD BantamX or Switch-Pros SP-9100 runs $500-800 and is cleaner, safer, and far less likely to cook a circuit than a DIY build; a discrete relay-and-fuse-block setup does the same job for $150-250 if you are willing to do the layout work yourself. Either way, wire it once and wire it properly, because electrical faults on a vehicle full of fuel lines and fabric are the failure mode with the worst outcome.
The JK's factory harness is sized for the factory's loads. Each accessory you add wants its own path: battery, fuse, relay, switch trigger, load, ground. When that path exists, a short blows a fuse and you drive home. When it does not — when a light bar is tapped into the interior fuse box through a piggyback adapter — a fault has to travel back through factory harness wiring that was never sized for it, and the wire becomes the fuse.
Worth noting up front: unlike the JL that replaced it, the JK did not ship with factory auxiliary switches as a standard feature. On this platform the switch bank is something you add, which is why the aftermarket for it is as developed as it is.
| Integrated (sPOD, Switch-Pros) | Discrete (relays + fuse block) | |
|---|---|---|
| Cost | $500-800 | $150-250 |
| Install time | 3-4 hours | 6-10 hours |
| Relays and fuses | Sealed module, one location | You source and mount them |
| Wiring runs | One control cable to the dash | One trigger wire per circuit |
| Troubleshooting | Panel indicates the circuit | Multimeter and your own diagram |
| Serviceability on trail | Swap a fuse in the module | Depends on how you built it |
| Expandability | Fixed channel count (commonly 6-8) | Add circuits as needed |
The integrated route is the honest recommendation for most people. The module holds the relays and fuses in one sealed box on the firewall or inner fender, and a single control cable runs to a switch panel at the dash. Fewer connections through the firewall means fewer failure points, and the sealed enclosure survives water crossings and engine bay heat in a way that a hand-built relay cluster on a bracket often does not.
The discrete route is genuinely fine and costs a third as much. It rewards planning: draw the circuits before you cut wire.
Do this on paper first. Total your loads and size the main feed and each branch.
| Accessory | Typical draw | Wire gauge (short run) | Fuse |
|---|---|---|---|
| LED light bar, 30-40 in | 8-15 A | 14 AWG | 20 A |
| Pod lights, pair | 3-6 A | 16 AWG | 10 A |
| Onboard air compressor (ARB twin) | 30-40 A | 10 AWG | 50 A |
| 12V fridge | 4-7 A running, higher on startup | 14 AWG | 15 A |
| Rock lights | 2-4 A | 16 AWG | 10 A |
| Aux 12V outlet / USB | 5-10 A | 14 AWG | 15 A |
Two rules that matter more than the table: size wire to the current and the length of the run, since voltage drop over a long run to a rear-mounted accessory can justify going up a gauge; and fuse to protect the wire, not the device. A fuse exists so the wire never becomes the weakest element in the circuit.
A winch is the exception to all of this — it draws hundreds of amps and does not belong on a switch bank. It gets its own dedicated cabling, covered in the winch wiring guide.
Every circuit follows the same shape: battery → main fuse → relay terminal 30; switch → relay terminal 86 (with 85 to ground); relay terminal 87 → branch fuse → accessory → ground. Mount the relays and fuse block together in a sealed enclosure rather than scattered on zip ties, use marine-grade tinned wire and adhesive-lined heat shrink at every termination, and keep the whole assembly out of the wheel well spray path.
Draw the diagram, keep a copy in the glovebox, and label the fuse block. A hand-built system nobody can read is a system nobody can fix on a trail.
Safety note: electrical faults start fires, and a JK's fuel and brake lines run through the same engine bay as this wiring. Fuse at the source, size wire to load and length, grommet every pass-through, keep runs away from exhaust and steering components, and disconnect the battery whenever you are working on the system.
Buy an integrated module if the budget allows — it is faster to install, sealed against the environment, and easier to diagnose. Build it discrete if it does not, and spend the saved money on wire and connectors good enough that the build lasts. Either way, plan the circuits before the first crimp, fuse everything at the battery end, and label it all. Then adding the LED lighting and everything after it becomes a twenty-minute job rather than another rewire.
| Part | Vendor | Est. price |
|---|---|---|
| Integrated switch system (sPOD BantamX / Switch-Pros SP-9100 / Trigger) | sPOD / Switch-Pros / Trigger | ~$600 |
| DIY alternative: 6-circuit fused relay block | Blue Sea Systems / Bussmann RTMR | ~$90 |
| Marine-grade tinned wire, 10/12/14/16 AWG assortment | Ancor | ~$70 |
| Adhesive-lined heat shrink connectors and terminals | Ancor / TE | ~$35 |
| Main feed circuit breaker or ANL fuse at the battery, 60-100A | Blue Sea Systems | ~$40 |
| Split loom, grommets, and stainless zip ties | various | ~$30 |
Written and maintained by an AZ wheeler and driveway wrencher. Always cross-reference your factory service manual — modifications affect vehicle safety and warranty. Work at your own risk.
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