Negative Battery Cable Harness – 14" Overmolded Multi-Battery (2/3/4 Battery, Red/Black)

The ROADWEST Overmolded Battery Harness is a heavy-duty 14 inch negative battery cable harness assembly designed to connect three batteries in a bank. Built around a 100% copper conductor and a durable overmolded design, it is ideal for semi trucks, cars, vans, RVs, boats and other 12V / 24V battery systems that require a reliable multi-battery negative connection.

The cable uses a high-purity copper conductor to deliver maximum current for quick starts and stable power. The overmolded insulation is waterproof, moisture resistant, flame retardant and heat insulating, helping protect the cable and connection points in demanding environments.

This 3-battery harness is designed to link three batteries together on the negative side. Integrated protective caps help shield the contacts from dirt, moisture and corrosion, keeping the connections clean and extending service life.

Thanks to its flexible construction, the harness remains easy to route and manage even in cold weather, and offers good resistance to shock and abrasion in everyday use. Installation is straightforward for most operators and technicians – simply route the cable, secure the terminals and caps, and ensure all connections are tight and clean.

Suitable for a wide range of vehicle and equipment applications, this overmolded battery harness is a smart upgrade or replacement choice for multi-battery systems on semi trucks, commercial vehicles, RVs, marine applications and more. Always confirm length and terminal style to match your existing setup before ordering.

• High-Quality Materials: 100% copper conductor for maximum current and reliable starting performance.
• Overmolded Protection: Waterproof, moisture resistant, flame retardant and heat insulating outer layer helps protect the cable and connections.
• 3-Battery Design: Purpose-built to connect three batteries in one negative harness, ideal for multi-battery banks.
• Corrosion Protection: Protective caps help cover the contacts and reduce corrosion from moisture and road debris.
• Flexible & Durable: Remains flexible in cold weather and is resistant to shock and abrasion for long-term use.
• Wide Applications: Compatible with semi trucks, cars, vans, RVs, yachts and other equipment using multi-battery systems.
• Easy Installation: Simple to route, assemble and manage in most battery compartments.