• Blue Ox BX8848 4-Diode Wiring Kit – RV Tow Electrical Harness
  • Blue Ox BX8848 4-Diode Wiring Kit – RV Tow Electrical Harness – view 2
  • Blue Ox BX8848 4-Diode Wiring Kit – RV Tow Electrical Harness – view 3
  • Blue Ox BX8848 4-Diode Wiring Kit – RV Tow Electrical Harness – view 4
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Blue Ox

Blue Ox BX8848 4-Diode Wiring Kit – RV Tow Electrical Harness

Blue Ox BX8848 4-Diode Wiring Kit – RV Tow Electrical Harness

$76.90 USD
MSRP $97.90 USD Our price $76.90 USD
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Why buy from RV Towing Pros

  • Genuine new partsBrand-new Blue Ox, never used or refurbished
  • Fit GuaranteeSend us your vehicle and we’ll confirm fit before you order. How it works
  • Ships in 5–8 business daysIn-stock parts; express available at checkout
  • Secure checkout & 30-day returnsPay with card, Shop Pay, PayPal and more

Questions? Message us — we answer within 1 business day.

Shipping & Returns

In-stock parts: standard shipping 5-8 business days, express available at checkout. Out-of-stock and special-order parts: 3-5 weeks. Returns accepted within 30 days of delivery (20% restocking fee; buyer pays return shipping unless we made an error).

Fit Guarantee: if you sent us your vehicle details before ordering and we confirmed fit, but the part doesn't fit, we cover return shipping and waive the restocking fee.

Questions? Message us — we answer within 1 business day.

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Product Description

The Blue Ox BX8848 is a 4-diode tail light wiring kit for flat-towed vehicles. It connects the towed vehicle's existing tail lights to the motorhome's lighting signals, so the car's brake, turn and running lights work while it's being towed. The diodes let the lights be powered from the motorhome without sending current back into the towed vehicle's electrical system.

The kit installs at the rear tail light housings: the diode modules are spliced into the brake/turn and tail light circuits on both sides, a ground wire is attached to the chassis, and the 26-foot harness is routed to the front of the vehicle to connect to your front-mounted plug. A 12-volt continuity tester, wire stripper, cutter and crimper are needed for installation.

Lighting circuits differ by vehicle; some vehicles are better suited to a bulb-and-socket kit or a vehicle-specific harness. Contact us with your towed vehicle's year, make and model if you're not sure which kit you need.

Specifications

  • Manufacturer: Blue Ox
  • Part number: BX8848
  • Type: Hardwire diode tail light kit
  • Diodes: 4 diode modules, 6 amp
  • Main harness: 26 ft

What's Included

  • 4 diode modules (6 amp)
  • 26 ft wiring harness
  • 12 ft brown and 12 ft green 16-gauge wires
  • 36 ft white 14-gauge ground wire
  • Female terminal couplings, butt connector and ring terminal
  • Self-drilling screw for the ground

Helpful Links

Pro tipWiring and battery tips

  • Protect the car’s wiring. Diodes or a separate bulb kit keep the motorhome’s lighting signal from feeding back into the towed vehicle’s electrical system.
  • Watch the battery. Some vehicles drain their battery when flat towed; the owner’s manual will say whether you need a charge line or battery disconnect.

Not sure what fits? Send us your vehicle — we’ll confirm before you order.

Our Fit Guarantee Tell us your vehicle before you order and we’ll confirm the part fits. If we confirmed it and it doesn’t fit, we’ll cover return shipping and waive the restocking fee. Check my fit

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