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Blue Ox
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Select your vehicle to confirm this part fits.
2006 - 2011 Chevrolet HHR
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1. Quick Installation: The EZ Light wiring harness is designed for a rapid and easy installation process, taking as little as 15 minutes.
Terminal Type: 4-Way Flat
Installation Required Yes/No: Yes
Mounting Hardware Included Yes/No: Yes
2770: No
488: Yes
Make your traveling experience smoother with the Blue Ox BX88278 EZ Light Wiring Harness. This automotive accessory simplifies the process of connecting your RV's electrical system to the car being towed behind. With a user-friendly design, the installation can be done in as little as 15 minutes. The product offers a terminal type of 4-way flat, making it compatible with most vehicles. It comes with all necessary mounting hardware, ensuring a hassle-free setup. Please note that installation is required.

Blue Ox is known internationally for recreational and commercial towing products, manufacturing in Pender, Nebraska since 1925. The line covers tow bars and vehicle-specific baseplates for flat towing behind a motorhome, sway control and weight distributing hitches, supplemental braking accessories and towing wiring, backed by patented designs and long-standing customer service.
Blue Ox has manufactured since 1925 and is recognised internationally for towing products and customer service. The company operates from Pender, Nebraska, where it grew out of Automatic Manufacturing Co., a business that started with cattle oilers and developed into agricultural equipment, tractor accessories and trailer towing hardware. That agricultural engineering heritage still shows in how the towing products are built, and the company holds patents across weight distribution, fifth wheel and tow bar designs.
Flat towing is the discipline Blue Ox is best known for. Towing a car with all four wheels on the ground behind a motorhome demands a system that stays rigid under braking, articulates properly over uneven ground, and connects to the towed vehicle at points strong enough to take the load. Blue Ox tow bars handle the first two, with self-aligning arms that latch under tension and release without a struggle when the load is off them. Vehicle-specific baseplates handle the third, engineered per make and model to tie into structural mounting points behind the fascia.
The wider flat towing range covers supplemental braking systems, safety cables and the accessories that make a complete legal setup, along with baseplate wiring and dinghy towing harnesses that pass lighting signals to the towed vehicle without back-feeding its electrical system.
For conventional trailer towing, Blue Ox weight distributing hitches with integrated sway control transfer tongue load onto the tow vehicle's front axle and resist the yaw that crosswinds and passing trucks induce.
The company describes its foundation as customer service, designing around what owners actually ask for, and it runs an RV park adjacent to the factory where customers can stay. Sister operations at the same Nebraska site include Automatic grain roller mills and MAD-RAMPS pivoting ramp systems.
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4 compatible vehicles
| Year | Make & Model | Style | Notes |
|---|---|---|---|
| 2005 - 2010 | Chevrolet Cobalt | 2-Door | — |
| 2006 - 2011 | Chevrolet HHR | — | — |
| 2007 - 2010 | Pontiac G5 | 2-Door | Also GT |
| 2005 - 2006 | Pontiac Pursuit | 2-Door | — |
The BlueOx EZ Light Wiring Harness Kit For Select COBALT(4 DR)/GS(4 DR) BX88278 (Part #FDRWBX88278) fits the following vehicles: 2005-2010 Chevrolet Cobalt; 2006-2011 Chevrolet HHR; 2007-2010 Pontiac G5; 2005-2006 Pontiac Pursuit. Always verify your specific year, make, and model before ordering.
Yes, the BlueOx EZ Light Wiring Harness Kit For Select COBALT(4 DR)/GS(4 DR) BX88278 (Part #FDRWBX88278) is designed to fit the 2005-2010 Chevrolet Cobalt.
The BlueOx EZ Light Wiring Harness Kit For Select COBALT(4 DR)/GS(4 DR) BX88278 (Part #FDRWBX88278) fits 2005-2010 Chevrolet Cobalt models. The 2011 model year is the last year covered by this part number. For newer models, check for an updated version.
The BlueOx EZ Light Wiring Harness Kit For Select COBALT(4 DR)/GS(4 DR) BX88278 (Part #FDRWBX88278) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
The BX88278 is a wiring harness kit that integrates your vehicle's tail lights with an RV electrical system for towing. It includes a converter box, a 4-way flat harness, wiring with yellow and green connectors, a ground wire with ring terminal, double-stick tape, zip ties, and a mounting screw. The kit allows you to connect your vehicle's lighting to a trailer plug for RV towing applications.
The manual does not specify vehicle compatibility or exclusions. The installation process assumes removable tail light housings and access to a suitable grounding point near the front of the vehicle. Contact Blue Ox customer service at (402) 385-3051 to confirm fitment for your specific vehicle.
You will need a drill with a 3/32" bit to create the grounding hole. The kit includes double-stick tape for mounting the converter box, zip ties for securing wiring, a screw and ring terminal for the ground wire, and connectors for the tail lights. You may also need a wire stripper and crimper if you choose to splice wires into a trailer plug socket instead of using the 4-way flat bracket.
The manual does not specify whether battery disconnection is required. For safety, it is recommended to disconnect the negative battery terminal before working with vehicle electrical systems. Consult your vehicle's service manual or contact Blue Ox at (402) 385-3051 for guidance specific to your vehicle.
Mount the converter box on the driver side behind the tail light using the double-stick tape provided. First, remove the driver side tail light housing and find a clean area behind it. Clean the mounting surface before applying the tape to ensure proper adhesion.
After removing both tail light housings, disconnect the original wiring harness from both tail lights. Plug the wiring kit end with the yellow wire into the mating plugs on the driver side taillight connector and vehicle wiring harness connector. Route the green wire end to the passenger side and plug it into the mating plugs on the passenger side taillight connector and vehicle wiring harness connector.
Route all loose wiring to the vehicle with zip ties after connecting the tail lights. Route the 4-way flat harness towards the front of the vehicle, securing it with zip ties. When reinstalling the tail light housings, position the wire harness between the housing and the vehicle body. Secure the remainder of the wiring harness in a secure area with zip ties to prevent damage and interference.
Mount the 4-way flat bracket in a convenient location at the front of the vehicle. The bracket should be positioned near a suitable grounding point. If you prefer, you can cut off the harness plug and splice the wires into a different style of trailer plug socket instead of using the bracket.
Yes, drilling is required. You must drill a 3/32" hole to secure the white ground wire with the ring terminal and screw provided. Locate a suitable grounding point near the connector at the front of the vehicle. Clean dirt, paint, and any rust proofing material from the area before drilling. Do not drill into any exposed surfaces, the vehicle floor, or bed.
Drill a 3/32" hole for the white ground wire. This hole accommodates the ring terminal and screw provided in the kit. Locate the hole near a suitable grounding point at the front of the vehicle, and ensure the area is clean of dirt, paint, and rust proofing material.
The yellow wire connects to the driver side tail light. The green wire connects to the passenger side tail light. The white wire is the ground wire, which must be secured to a grounding point near the front connector using the ring terminal and screw provided.
Locate a suitable grounding point near the front connector. Clean dirt, paint, and any rust proofing material from the area. Drill a 3/32" hole and secure the white wire with the ring terminal using the screw provided. Do not drill into any exposed surfaces, the vehicle floor, or bed.
Yes. Apply a small amount of dielectric grease to the 4-way flat terminals to prevent corrosion. This should be done before connecting to the RV electrical system.
Connect the harness to the RV electrical system and test all functions with the engine running to ensure proper operation. This verifies that the tail light integration and trailer lighting are working correctly.
Yes. You can cut off the 4-way flat harness plug and splice the wires into your preferred style of trailer plug socket. Mount the socket in a convenient location at the front of the vehicle. Ensure all splices are properly insulated and secured.
The BX88278 works with vehicles that have removable tail light housings and access to a suitable grounding point. Contact Blue Ox at (402) 385-3051 to confirm fitment for your specific vehicle.
You need a drill with a 3/32" bit. The kit includes double-stick tape, zip ties, a screw, ring terminal, and connectors. If splicing into a different trailer plug, you will also need a wire stripper and crimper.
Yes. You must drill a 3/32" hole for the ground wire. Do not drill into exposed surfaces, the vehicle floor, or bed.
The white wire is the ground wire. Secure it to a suitable grounding point near the front connector using the ring terminal and screw provided. Drill a 3/32" hole in a clean area and do not drill into exposed surfaces, the vehicle floor, or bed.
Connect to the RV electrical system and test all functions with the engine running to ensure proper operation.
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