Flood Lights Positioning on the INEOS Grenadier: 3 Mount Locations Ranked by Owners

The INEOS Grenadier ships with three DTP power outlets along the roof rack/grab rail system, all wired to the EXT3 circuit (25A, 300W shared). INEOS pre-wired the connectors and left the mounting choices entirely to the owner. Flood lights for camp, work, or off-road recovery are the most common use — but where you mount them changes the coverage pattern, ease of installation, and door clearance.

Forum owners across North America, Australia, and Europe have been testing positions since 2023. The consensus is clearer than most lighting guides acknowledge: the grab rail side-mount wins for camp use, the rack under-mount wins for trail, and the DTP connector requirement is the single most common gotcha that trips up first installs.

This guide covers all three positions, the connector swap you can't skip, and how to choose light pattern and wattage for each location. DVA's LED Side Flood Light is designed specifically for the grab rail position — pre-terminated with a DTP plug, no swap needed.

The Three Flood Light Positions

The grab rails run the full length of the Grenadier roof on both sides. The upper grab rail bracket screw accepts an aftermarket U-bracket with no modifications required. The bracket slots under the screw head, the light mounts to the bracket, and the wire runs to the nearest EXT3 DTP outlet on the rack above.

This position puts the light at roof height facing outward and down — the ideal angle for illuminating the area immediately beside the vehicle at camp. Two lights (one per side) light both sides of the vehicle simultaneously, all controlled by the same interior EXT3 switch.

"Picked up a set of these ARB Base Rack Auxiliary lights. The U bracket of the supplied mount sits nicely under the upper screw for the grab rail. I put one on each side."

— clark-kent, TheIneosForum (thread #12413131)

The aftermarket rack auxiliary lights clark-kent used draw 0.9 watts each — deliberately low for fixed-intensity camp lights where you don't want to blind yourself or neighbours. Higher-output floods in the 18W range deliver significantly more lumens but require the same DTP swap.

For grab rail mounting, the light must clear the door when it opens. Keep the light body oriented fully outward (not angled down more than about 30°) so the door arc doesn't contact it. Forum owners using custom 3D-printed brackets have reported good results designing inward clearance into the mount.

"I have just installed similar Stedi Micro Touch Dual Colour 7.8 inch lights to the grab rail. First step was to snip off the smaller DP plug and replace it with a DTP. The cable is very short — if I were to do it again I would probably leave the manufacturer's plug attached and fashion an adaptor."

— tangocharlie80, TheIneosForum (thread #12417896)

tangocharlie80's observation about cable length is important: work light wiring is often cut short for grab rail positions. Measure the distance from your chosen mount location to the nearest DTP outlet before ordering — some owners need a 30–50cm DTP extension lead.

DVA's LED Side Light (Roof Bar Mount) and LED Side Flood Light are both pre-terminated with DTP plugs and sized precisely for the grab rail position — no connector work, no extension leads required.

Mounting a flood light under the roof rack, between the rack and the roof, puts the light at a lower angle with more downward throw. This position suits trail driving — illuminating the ground close to the vehicle when you're picking a line through rock or ruts at low speed.

The constraint is door clearance. The Grenadier's rear doors open past vertical, and the door arc can reach lights that hang below the rack's lower rail. Forum owners who've done under-rack mounts consistently emphasise staying fully inside the rack footprint.

"Stedi cube light on my custom bracket. I needed to stay fully below the rack and still clear the door. Stainless bracket mounts to both top and bottom of the rack, rock solid and gets the job done. I bought a Stedi harness, shortened it, replaced a DT with a DTP, then it was plug and play."

— tom109, TheIneosForum (thread #12415826)

tom109's approach — stainless bracket anchored to both the top and bottom rack rail — eliminates vibration flex that single-point mounts develop on corrugated roads. The double-mount approach is the recommended method for any rack under-mount regardless of brand.

Wattage matters more here. Under-rack position at cab height delivers less visual throw than a roof-height side-mount. Use a narrow flood (60°–90° beam) rather than a super-wide flood (120°+) to concentrate lumens where they're useful on trail.

Mounting lights on the grab rail bar facing straight outward — rather than angled down — gives the widest lateral coverage at camp. Motorcycle clamps (typically 1–1.25" diameter, matching the grab rail tube) provide a quick no-drill solution. Some owners use commercial clamp brackets with minor arm adjustments; others 3D-print custom clamps to get the exact outward angle without rear clearance issues.

"Fitted up some side lights today, very pleased with them. 2 x Stedi Micro Touch V2 Dual Colour 13.9" and Motorcycle Mounting Bracket 2Pcs 0.75" 1" 1.25" Horizontal Bull Bar Mounting Bracket. Plugged into roof top power outlets using Deutsch DTP plugs."

— tjeska, TheIneosForum (thread #12417896)

"Next step was to 3D print some clamps to attach the light to the grab rails. I opted to print my own rather than use commercial clamps because the fastenings were designed to come in from the rear of the commercial bracket which is difficult to access when the bracket is attached to the rail."

— tangocharlie80, TheIneosForum (thread #12417896)

tjeska's 13.9" dual-colour lights provide camp mode (amber, dimmable) and work mode (white, full output) — which is a significant advantage for the side-mount position where the lights are most visible to anyone sitting beside the vehicle. Dual-colour lights with built-in touch switches allow brightness and colour changes directly on the light body without going back to the cab.

Position Comparison

The DTP Connector Requirement

Every EXT3 roof outlet on the Grenadier uses a Deutsch DTP Series 2-way connector. This is a robust weatherproof connector with a 12mm shell diameter — larger than the Deutsch DT Series (which has a similar appearance but different body diameter and keyway).

Most off-road work lights ship with bare wire ends or a DT plug. Neither works directly with the Grenadier roof outlets. You have three options:

• Buy lights pre-terminated with DTP — DVA's LED Side Flood Light ships with a DTP plug already crimped. Plug-and-play, no tools needed.
• Crimp your own DTP plug — Buy a Deutsch DTP 2-way male plug kit and a ratcheted crimping tool. A good kit runs around $80–120 USD. One crimp per wire, two wires per light.
• Build an adapter — Leave the original plug intact and build a short DT→DTP adapter lead. tangocharlie80's preferred approach when cable length is tight.

"Stedi do 3 versions of the 7.8" LED light, Amber, white and a dual colour version (which has external switches). The lights are wired with a DT plug, whereas the Grenadier has a DTP roof outlet connector. These are different types of Deutsch connector so you will have to make an adaptor. My dual colour LED came with a DT plug — bare end wire pig tail to which I crimped/soldered a DTP plug so I could plug into the roof outlet."

— rok_dr, TheIneosForum (thread #12418367)

The DIY crimp route is not difficult once you have the tool. Forum users consistently recommend a ratcheted crimper with interchangeable jaws — the ratchet mechanism ensures a complete crimp cycle and eliminates under-crimped pins that fail in vibration. DVA's Wiring & Connectors collection includes pre-made DTP cables and connector kits for both routes.

EXT3 Circuit Specs and Limits

All three roof DTP outlets run on the EXT3 circuit (sometimes called the "roof rack distribution" circuit in owner documentation). Key specs from verified Grenadier technical sources:

If you're running two 18W floods (one per side) on EXT3, total draw is 36W — well inside the 300W limit. Dual 45W floods would draw 90W, still well within range. The 300W limit only becomes relevant if you add a roof light bar on the same circuit (not recommended — high-output bars belong on the dedicated EXT2 circuit).

The single interior switch controlling all three outlets is worth planning around. If you want to switch driver-side and passenger-side lights independently, you need to add inline switches on the light leads or use dimmable lights with built-in touch controls (as in the dual-colour touch-sensitive options several forum owners have fitted).

DVA Flood Light Options for the Grenadier

DVA engineers these lights specifically for the Grenadier's DTP outlets — no connector modification, no wiring guesswork.

Both products are also listed in DVA's LED Lighting collection alongside roof-mounted light bar options for owners who want a complete front-facing forward lighting upgrade at the same time.

If you're building a multi-zone lighting setup — roof bar forward-facing plus side floods for camp — DVA's LED Roof Light Bar handles the EXT2 forward zone while the side flood lights handle EXT3. The two circuits are independent, giving you separate switch control for driving versus camp mode.