Grenadier Rock Lights Setup: Mounting Zones, Aiming & Coverage Patterns

Rock lights on the INEOS Grenadier mount in four zones: the two front bumper corners, the frame rails behind each front wheel, the rear sill area, and the two rear bumper corners. A full build uses eight pods — one per corner, two per frame section. Amber LEDs are the forum-preferred choice for camp lighting; they preserve night vision better than white and cut less glare when running alongside other vehicles on a trail. Physical setup — where to mount, how to aim, what mounting method to use — is the piece most guides skip. Wiring follows naturally from placement, not the other way around.

1. The Four Mounting Zones

The Grenadier's frame, bumpers, and sill geometry create four natural zones for rock light placement. Each zone solves a different part of the coverage gap — bumpers throw light forward and behind, frame-rail mounts fill the lateral zone under the doors, and rear corners cover the campsite footprint behind the truck.

2. Mounting Methods: Drilled vs Magnetic

There are two installation philosophies for the Grenadier, and the right choice depends on which zone you're mounting in.

Drilled-and-Bolted (Bumper Corners)

The front and rear bumper corners are the most secure mounting points on the platform. Forum owner experience confirms that bolting directly to the bumper — three holes per pod: two for the mount, one for the wire passthrough — is the most durable option at these positions. The Grenadier's bumper is a structural component, not just cosmetic, so it handles the fastener load well. Use stainless M6 hardware and seal the wire entry with a waterproof grommet.

L-Bracket + Magnet (Frame Rails)

For the center frame positions, a no-drill approach using L-brackets and rare-earth magnets is the forum-recommended solution. The magnets are strong enough to hold the pods through sand washes, rutted dirt roads, and slow rocky terrain — but they flex and slide on hard impact instead of ripping the light off entirely. This behavior, borrowed from the rock-crawler community, makes the center-frame positions significantly more durable over the long term than hard-mounted alternatives at the same location.

3. Aiming & Height Rules

Aim angle and mount height directly determine how useful the lights are in the field. Get either wrong and you have a build that looks great parked in a driveway and disappoints on a trail.

Vertical Aim: 30–45° Down from Horizontal

Rock lights are proximity illumination — they're meant to light up the ground two to three meters from the truck, not project a beam. Aim each pod 30–45° downward from horizontal. Steeper than 45° and the pool of light is too close to the vehicle; shallower than 30° and it washes out without sufficient brightness at ground level. The rear pods can be aimed slightly shallower (20–30°) to give more campsite area coverage.

Mount Height: Above the Lowest Sill Point

The single most important mounting rule for the center-frame pods: keep the bottom of each light above the lowest point of the body sill and rocker panel. The Grenadier's sill is the limiting obstacle in tight terrain — anything lower risks rock contact on the lights before the body takes a hit.

Horizontal Aim: Angle Out 10–15°

Angling each pod outward 10–15° from straight down prevents the illuminated pools from stacking directly under the truck and instead pushes them into the visible zone beside the wheels — the area you actually need to see when picking a line through rocks.

4. Coverage Patterns by Use Case

Use Case	Active Zones	Color Temp	Aim Angle
Camp lighting	Rear corners + rear frame rails	Amber	25–35° down
Trail driving (forward)	Front corners + front frame rails	Amber or white	35–45° down
Rock crawling	All eight pods	White	40–45° down, angled out
Night vision preservation	Rear corners only	Amber	30° down

The forum consensus is amber for all-around use: night vision preservation at camp, reduced glare for other trail users, and natural-feeling illumination versus the clinical white-blue wash of cool-white LEDs. White makes sense for rock crawling where maximum detail at wheel contact points matters more than ambiance.

5. Wiring the Setup: Which EXT Circuit

Where you wire depends on where you mount. The rule is simple: bumper-mounted pods pull from EXT1 (under-hood), body-mounted pods pull from EXT3 (door-pillar DTP ports). This separates the circuits by physical proximity, minimizes wire runs, and keeps bumper lights on an independent switch from the body lights.

Zone	Circuit	Location	Fused Capacity
Front/rear bumper corners	EXT1	Under-hood pigtail	10A fused
Center frame rails (body)	EXT3	Door-pillar DTP ports	25A shared (3 ports)
Side molle panels	EXT3 (roof)	Roof DTP port	25A shared

Connecting body-mounted pods via the DVA DTP splitter lets you run two pods off a single EXT3 port without tapping into factory wiring. Full wiring details — wire gauge, load math, Deutsch connector assembly — are covered in the Grenadier Rock Lights Wiring Guide.

6. Alternative: Side Molle Panel Mounting

One forum approach worth noting: mounting pods to aftermarket side molle panels rather than directly to the frame. The molle panels sit slightly higher off the ground and provide a flat bolt surface without any frame drilling. The tradeoff is limited downward aim angle — the panel geometry forces a shallower mounting plane. Wire runs to the roof DTP port instead of EXT3's door pillar port.

This approach is useful if you want to avoid all frame drilling and already run Kaon or similar side panels. The DVA LED Side Flood Light achieves a similar outcome from the roof bar — broader area coverage at sill-height plus, feeding off the same EXT3 circuit, with no panel drilling required.

7. Common Setup Mistakes

• Mounting too low: Pods below the sill are the first thing to contact rocks. Height rule — always above the lowest body/sill point — eliminates this problem.
• Aiming too flat: Pods aimed near-horizontal waste output on the far ground and create glare for oncoming vehicles. 35–45° down is the correct range for trail use.
• All pods on one circuit: Splitting front and rear across EXT1 and EXT3 gives independent control without any relay work. One switch off = half the truck still lit.
• Using white LEDs for camp: White at 6000K blows out night vision and irritates other campers. Amber for camp; white for maximum rock-crawl detail.
• Skipping Deutsch connectors on the harness: Butt-spliced wires under the vehicle fail from vibration and moisture. Use Deutsch DT or DTP crimp connectors at every junction — same connector family as the factory auxiliary system.

What Owners Actually Use It For

The forum owner who built out the eight-pod Amber setup described the real-world use pattern clearly: rock lights get used most often around camp at night — not on the trail. The reason is practical: at camp, you want low, wide illumination without killing night vision or blinding everyone at the site. The Grenadier's amber rock lights in rear-corner + frame-rail mode put out exactly that pattern. The trail use comes second, and rock crawling a distant third in frequency.

This maps directly to the complementary role of DVA's roof-bar side lights: rock lights at ground level paired with side-mounted floods at roof height give complete vertical coverage from sill to cab — the "full perimeter illumination" pattern that forum builds converge on after a season of use.