If you're looking to give your rig that classic, old-school glow, you really can't beat a set of peterbilt 389 watermelon breather lights. There's just something about that specific bulbous shape and the way the light catches the facets of the lens that screams "large car." Whether you're running a show truck or a daily workhorse, the air cleaners are one of the first things people notice when you're pulling into a truck stop or rolling down the interstate at night.
For a lot of guys, the stock lights that come on a 389 are just… fine. But "fine" doesn't cut it when you're trying to build a truck with some personality. The watermelon style, named for its rounded, textured look that resembles the fruit, has been a staple in the trucking industry for decades. It takes that square, modern Peterbilt styling and softens it with a bit of vintage flair.
Why the Watermelon Style Still Wins
You might wonder why, with all the high-tech LED strips and crazy color-changing light bars out there, people are still obsessed with the watermelon look. Honestly, it's about the vibe. The peterbilt 389 watermelon breather lights offer a depth of light that flat LEDs just can't match. When you look at a flat light, you see a point of light. When you look at a watermelon lens, the light bounces around inside the housing, filling the whole "cup" and creating a rich, warm glow.
It's also about heritage. The 389 is the successor to the legendary 379, and it carries a lot of that "long hood" DNA. Adding watermelon lights to the breathers (the air cleaners) is a nod to the trucks of the 70s and 80s. It's a way of saying you respect the history of the road while driving a modern machine. Plus, let's be real—they just look badass when they're reflected off a polished stainless steel air cleaner.
Glass vs. Polycarbonate Lenses
When you start shopping for these, you're going to run into a big debate: glass or poly?
Old-school purists will tell you that glass is the only way to go. Glass lenses don't fade, they don't yellow from the sun, and they have a certain weight and clarity that plastic can't touch. If you're building a pure show truck, glass is probably your best bet. However, there's a downside. Road debris. One well-placed rock kicked up by a passing car, and your expensive glass lens is toast.
That's where polycarbonate comes in. Most of the peterbilt 389 watermelon breather lights you'll find today are made from high-impact plastic. They're way tougher than they used to be. They can take a hit from a stone and keep on glowing. The downside is that after a few years in the sun, they might start to cloud up a bit, but for a truck that's actually working for a living, the durability is usually worth the trade-off.
Getting the Fit Right on Your Air Cleaners
The Peterbilt 389 typically comes with either 13-inch or 15-inch air cleaners. Before you go ordering a whole kit, you need to make sure you know what you're working with. The spacing of the lights is also a big decision. Some guys like the "starburst" look with lights spaced all the way around the breather, while others prefer a single vertical row facing forward or toward the cab.
The most common setup for a 389 is a vertical bracket that mounts to the side of the breather canister. These brackets are usually stainless steel—because why would you put anything else on a Pete?—and they come pre-drilled for the watermelon housings. If you're doing a DIY job, you'll want to measure three times and drill once. There's nothing worse than a crooked line of lights ruining the symmetry of your hood.
Choosing Between Amber and Clear Lenses
This is where you can really customize the look of your truck. Most guys go with the classic amber lens. It's DOT compliant in most spots for the front of the vehicle, and it gives off that traditional "chicken light" warmth. It looks great against almost any paint color, especially black, blue, or red.
But, if you want something a bit cleaner and more modern, clear lenses with amber LEDs are a huge trend right now. During the day, the clear lenses blend in with the chrome and stainless steel, giving the truck a very "iced out" and sleek appearance. Then, as soon as you flip the switch at night, they pop with that bright amber light. It's a "best of both worlds" situation. Just keep in mind that clear lenses show dirt and moisture a lot easier than colored ones do, so you'll be spending a bit more time with the Windex.
Wiring and Installation Tips
I've seen a lot of guys get frustrated with wiring, but it doesn't have to be a nightmare. When you're installing peterbilt 389 watermelon breather lights, the biggest hurdle is usually the ground. Since the air cleaners sit on rubber gaskets to dampen vibration, they aren't always naturally grounded to the chassis.
If you just hook up your power wire and bolt the light to the breather, you might find that it flickers or doesn't work at all. It's always a good idea to run a dedicated ground wire back into the engine bay or to a solid frame point. It's a bit more work upfront, but it saves you from chasing "ghost" electrical problems six months down the road when you're in a rainstorm in the middle of Nebraska.
Also, use heat-shrink connectors. Please. Don't just use electrical tape. The vibrations and the weather will eat through tape in no time. If you're going to spend the money on nice watermelon lights, spend the extra ten bucks on a good wiring kit.
Maintenance and Keeping Them Bright
Once you've got them on, you want them to stay looking sharp. The chrome bezels that hold the watermelon lenses in place are prone to pitting if you don't keep them clean, especially if you drive in states that use a lot of salt or brine during the winter. A quick wipe-down with a chrome polish every couple of weeks goes a long way.
If you go the LED route—which most people do these days for the longevity—you won't have to worry about bulbs burning out very often. But if you're a "true" old-schooler using incandescent bulbs for that extra-warm glow, keep a box of spares in the glove box. Heat is the enemy of those bulbs, and the enclosed space of a watermelon housing can get pretty toasty.
Another thing to watch for is moisture. Even the best seals can fail eventually. If you see fogging inside your lens, take it apart, dry it out, and maybe add a tiny bead of clear silicone around the gasket. It's a simple fix that prevents the internal components from corroding.
The Final Verdict on the Look
At the end of the day, a Peterbilt 389 is a statement. It's one of the last "square" trucks on the road in an era of aerodynamic, plastic-looking rigs. Adding peterbilt 389 watermelon breather lights is like putting a period at the end of a sentence. It completes the thought.
It doesn't matter if you have three lights on each side or fifteen; that specific glow is what turns heads. It's the difference between a truck that's just a tool and a truck that's a source of pride. If you're on the fence about it, just look at a few photos of a 389 lit up at dusk with those amber watermelons reflecting off the hood. You'll be reaching for your wallet pretty quickly.
There's a reason this style hasn't gone away despite all the "modern" upgrades available. It works. It looks good. And for a Peterbilt owner, that's usually all the justification you need. So, go ahead and get those lights mounted—your rig will thank you for it next time you're cruising under the stars.