Trailer Lighting & Electrical Systems
We supply complete trailer lighting and electrical packages — LED tail lights, side marker lights, clearance lamps, wiring harness and connectors — sized and wired to bolt straight onto flatbed, tanker, lowbed and container chassis. Everything ships sealed against dust and water ingress, because a trailer light that fails on a dirt road at night is a compliance problem and a safety one.
Specifications
| Voltage | 12V and 24V, both available |
|---|---|
| Lamp type | LED (standard), incandescent on request |
| Functions | Tail, stop, turn, reverse, side marker, clearance, license plate |
| Sealing | IP67, dust and water resistant |
| Connector | 7-pin/15-pin ISO 1185 & 3731, N-type, ADR options |
| Harness | PVC-jacketed, color-coded, pre-terminated |
| Certification | DOT, ECE R7/R48, E-marked |
| Housing | Impact-resistant polycarbonate lens, corrosion-resistant base |
LED Trailer Lights Built for Vibration and Dust
A trailer running loaded on rough roads puts more vibration through the rear lighting than almost any other part on the chassis, which is why cheap incandescent tail lights fail early — the filament shakes apart. Our LED trailer light units have no filament to break, draw a fraction of the current, and run cooler, which matters when they're mounted right next to a mudguard bracket catching road spray all day. Every housing is sealed to IP67 so dust and water don't reach the circuit board, not just the lens gasket.
We stock the full function set — tail, stop, turn, reverse and license plate lamps — as combination units or separate lamps depending on how your chassis is built, matched to either 12V or 24V trailer electrical systems.
Side Marker and Clearance Lights for Regulatory Compliance
Side marker light and clearance light placement is one of the more commonly inspected items on cross-border and highway trailers in African, Middle Eastern and EU-adjacent markets — missing or non-functioning marker lights are an easy flag for roadside inspectors. Our LED marker lamp units are amber or red per position requirement, low-profile so they don't snag on loading or clip cargo straps, and sealed the same as the tail lights.
We size the marker light spacing to your trailer length per the applicable regulation (typically every 1.5-2m along the side rail) and can supply pre-wired marker light strings on a single harness run for faster installation on new-build trailers.
Trailer Wiring Harness — Pre-Terminated and Color-Coded
A trailer wiring harness that isn't color-coded and properly terminated is where most electrical faults start — a loose crimp connector under a mudguard bracket, chafed insulation against a chassis edge, corrosion creeping into an unsealed splice. We supply the harness pre-terminated with sealed connectors at every lamp position, color-coded to standard trailer wiring convention, and jacketed in abrasion-resistant PVC rated for the underbody environment.
Harnesses are built to length for your specific chassis — tell us the trailer wheelbase and number of axles and we cut and terminate rather than shipping a generic coil you splice and shorten on site. This pairs directly with the brake system wiring where ABS sensors share the same harness run on modern trailers. We also sell trailer wire by the roll for workshops that prefer to run and splice their own harness rather than order a pre-terminated assembly — the same color-coded, abrasion-resistant gauge we use in-house, not a generic hardware-store spool.
Trailer Plug and Electrical Connectors
The trailer plug is the single point of failure most fleets underestimate — a worn 7-pin or 15-pin connector at the kingpin end causes intermittent lighting faults that are maddening to diagnose because they only show up mid-route when the connector flexes. We supply ISO 1185 (7-pin) and ISO 3731 (15-pin ABS-capable) trailer plugs and sockets, N-type for markets running that standard, plus ADR-rated connectors for hazardous cargo trailers where spark containment matters.
Every electrical connector we ship is sealed against moisture ingress at the pin contacts, not just at the housing — the detail that actually prevents the corrosion-driven failures that show up 18 months into service. Trailer plug wiring varies pin-for-pin between the 7-pin and 15-pin standards, so we include a wiring reference matched to our color code with every batch of plugs and sockets, rather than leaving the installer to guess which core lands on which pin.
Frequently Asked Questions
Do you supply 12V or 24V trailer lighting systems?
What's the difference between a 7-pin and 15-pin trailer plug?
Are the LED trailer lights waterproof?
Can you build a wiring harness to a custom trailer length?
How many side marker lights does a trailer need?
Tell us the part you need and your destination port — we'll send specs & a quote today.
Reply within 24 hours — or WhatsApp us at +86 199 5331 6215.