Jammy J-20445-KCD LED Trailer Light Kit — Complete Submersible Over 80" Kit with Wiring

The Jammy J-20445-KCD is a complete, ready-to-install LED trailer lighting kit designed for trailers over 80 inches wide. Everything you need to fully light your trailer is included in one clamshell package — both tail lights, marker lights, a 25-foot wiring harness, license plate bracket, and all hardware. No guesswork, no extra trips to the store.

Built around the 7-function J-20445 bell-jar LED combination lights, this kit delivers stop, turn, tail, rear clearance, rear reflector, side marker, and side reflector functions in a fully submersible sealed housing — making it the go-to choice for boat trailers, PWC trailers, and any trailer that sees water, mud, and harsh conditions regularly.

What's Included in the Kit

Why Choose the Jammy J-20445-KCD Kit?

• Complete kit — nothing else to buy — both tail lights, marker lights, 25' wiring harness, license plate bracket, and all hardware included
• 7-function combination lights — stop, turn, tail, rear clearance, rear reflector, side marker, and side reflector in a single sealed unit
• Fully submersible bell-jar housing — gasketed lenses with sealed construction handle repeated water immersion; no fogging, no corrosion
• 16-diode curbside / 20-diode driver side — high-output LED array for maximum visibility
• DOT / SAE compliant — meets FMVSS-108 for all required trailer lighting functions
• Marine-grade construction — stainless hardware and sealed housing built for saltwater environments
• 25-foot wishbone harness included — pre-wired for straightforward installation on trailers of all lengths
• Self-grounding design — simplifies installation; no separate ground wire required

📐 Specifications

Cross-Reference — What Does the J-20445-KCD Replace?

The J-20445 tail lights use the industry-standard 4-inch square footprint with 2-bolt / 2" center-spacing mount — the same pattern used across Peterson, Optronics, and Wesbar square combination lights. This kit is a direct aftermarket replacement for the following:

Not sure if this kit replaces yours? The tail lights fit any trailer using a 4-inch square housing with 2-bolt mount on 2" centers. Measure your existing light footprint and stud spacing to confirm before ordering.

Trailer Compatibility — Boat & PWC Applications

The J-20445-KCD is the complete replacement lighting solution for wide-body boat and PWC trailers — providing all DOT-required lighting functions in a single kit. If your trailer is over 80 inches wide and uses 4-inch square tail lights, this kit has everything you need.

Confirmed Compatible Trailer Brands

Common Boat & PWC Types

The J-20445-KCD is commonly used on trailers hauling: bass boats, pontoon boats, aluminum fishing boats, center console boats, bowriders, ski boats, deck boats, Boston Whaler, Sea Ray, Lund, Tracker, Carolina Skiff, Jon boats, Sea-Doo, Yamaha WaveRunner, Kawasaki Jet Ski, and similar PWC / personal watercraft.

Saltwater use: The J-20445's bell-jar sealed housing, stainless mounting hardware, and self-grounding construction make it one of the most durable submersible lighting solutions available for coastal and tidal environments. The kit is a direct upgrade over aging incandescent systems that corrode and fail with regular saltwater exposure.

Verify fit before ordering: Confirm your trailer uses a 4-inch square light housing with 2-bolt mount on 2" centers. If your trailer uses an 8" rectangular housing, see the individual J-75 and J-75L lights instead.

💡 Pro Tips

The J-20445-KCD installs using the two pre-installed mounting studs on each tail light, spaced 2 inches on center. The included 25-foot wishbone harness runs the full length of your trailer and connects to your tow vehicle's standard 4-pin or 5-wire connector. Both tail lights use a self-grounding design — ground is made through the mounting studs, eliminating the need for a separate ground wire.

Typical wiring connections via the included harness:

• Brown → Tail / running lights
• Yellow → Left stop / turn signal
• Green → Right stop / turn signal
• White → Ground (harness ground to vehicle)
• Black → License plate light (driver side)

The two amber J-5735-SA marker lamps mount on the front corners of the trailer and connect to the brown running light circuit. The license plate bracket mounts to the driver-side tail light housing.

Is this a complete kit — do I need to buy anything else?
Yes, this is a complete kit. The J-20445-KCD includes both tail lights, two amber marker lamps, a 25-foot wishbone wiring harness, license plate bracket, wire connectors, and all mounting hardware. For most trailer rewiring jobs, this is everything you need.

Are the lights truly submersible?
Yes. Both the J-20445 and J-20445-L use a gasketed bell-jar sealed housing rated for full water immersion — including repeated dunking at the boat ramp and saltwater exposure.

What size trailers is this kit designed for?
This kit is specifically designed for trailers over 80 inches wide, which are required by federal law to have rear clearance lights, side marker lights, and a DOT-compliant tail lighting system. The 7-function combination lights satisfy all of these requirements in a single unit per side.

Will this replace my existing Peterson or Optronics square lights?
In most cases, yes — as long as your current lights use a 4-inch square housing with 2-bolt / 2" center mount. Measure your existing light footprint and stud spacing to confirm before ordering.

What's the difference between this and the J-75 / J-75L lights?
The J-20445 series uses a 4-inch square bell-jar housing, while the J-75 / J-75L use an 8-inch rectangular housing. Both are submersible over-80" trailer lights — the difference is the mount style and housing shape. Check your existing lights to determine which fits your trailer.

Is this kit DOT legal?
Yes. All lights in the J-20445-KCD are DOT and SAE approved, meeting FMVSS-108 requirements for stop, turn, tail, clearance, marker, and license plate illumination.

Questions? Call or text AAA Trailer at 517-225-1991 — we'll confirm this is the right kit for your trailer before you order.

📞 Call/Text: 517-225-1991 🌐 AAATrailer.com

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• Address: 4675 East Grand River Ave, Howell, MI 48843
• Phone: (517) 225-1991 (Call or text)
• Hours: Monday to Friday: 10:00 AM - 5:30 PM | Saturday: By appointment

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