Description

1027 Auxiliary Indicator for Trucks

The 1027 Auxiliary Indicator for Trucks is WAS’s long-cable side repeater — engineered for commercial vehicles where the indicator loom runs a significant distance from the mounting point. At £49.99, it ships with a 3000mm cable, operates on both 12V and 24V systems, and uses a full LED lamp array. If your existing side repeater is dead, cracked, or pulling the relay into hyperflash — this is the replacement to fit.

Standard short-cable units won’t reach on every truck. Trailers, longer rigids, and vehicles with non-standard body configurations often need a cable run that most side repeater lamps simply can’t provide. The WAS 1027 truck indicator light solves that directly — 3 metres of cable, dual voltage, no compromise.

What Is the 1027 Auxiliary Indicator for Trucks?

The WAS 1027 is a professional auxiliary indicator built for trucks, trailers and commercial vehicles operating across UK and EU road networks. It delivers the legally required side-facing turn signal at both 12V and 24V — without modification, without adaptors, and without additional components.

How the Auxiliary Indicator Works

Current enters through the 3000mm pre-wired cable from the vehicle’s indicator circuit. On a signal input, the LED array activates in under 200 milliseconds — faster than any filament equivalent — and pulses in sync with the front and rear lamps. Internal voltage regulation handles the full 12V–24V range, meaning the same unit works across light commercials and heavy tractor units. LEDs also draw significantly less current than filament bulbs, which reduces thermal load on the flasher relay across the full operating cycle.

Why Truck Auxiliary Indicators Fail

Physical impact is the primary cause — side repeaters sit exposed on vehicle flanks and absorb knocks from loading bays, gateposts and tight manoeuvres. Water ingress through a degraded seal is the second major failure mode — once moisture reaches the terminals, corrosion progresses quickly and silently. On vehicles covering long annual mileages, sustained vibration loosens connector pins over time. None of these failure modes are repairable. The unit needs replacing.

1027 Auxiliary Indicator for Trucks — Full Specifications

1027 Auxiliary Indicator for Trucks — Compatibility

The 1027 auxiliary turn signal unit operates across the full 12V–24V range — covering everything from light commercials to fully laden 44-tonne tractor-trailer combinations. The 3000mm cable is the defining specification here. It makes this unit the correct choice wherever shorter-cable repeaters fail to reach the vehicle loom.

Confirming Fitment

Measure your cable routing distance before ordering — from the mounting aperture to the nearest loom connection point. The 3000mm cable provides substantial reach, but confirm the run on your specific vehicle. Also verify mounting aperture dimensions against your existing unit, particularly on bodywork that has been repaired or modified.

Cross-Reference Table

  When and Why to Replace

1027 Symptoms — What to Watch For

Complete loss of output from the side repeater. Front and rear indicators cycle normally — but the side is dark. Terminal corrosion or a dead LED array inside a water-ingressed housing. The WAS 1027 LED indicator assembly is the direct fix.

Hyperflashing on the dashboard indicator. The flasher relay detects an open circuit in the side repeater and compensates with a doubled flash rate. That rapid clicking is a direct diagnostic — the fault is in the side repeater circuit. Left unresolved, it accelerates relay wear.

Cracked lens or damaged housing. UV degradation and physical impact make lenses opaque and housings brittle over time. Even if the LED array still fires, a visibly damaged unit won’t pass a DVSA inspection. At £49.99 for a dual-voltage, 3-metre-cable replacement, there’s no justification for leaving it on the vehicle.

Fix Truck Side Repeater Fault — Fit the 1027

LED arrays don’t repair — they replace. The WAS 1027 side repeater lamp drops into the existing aperture, connects via the 3000mm pre-attached cable, and operates immediately across both voltage systems. One part number. Both sides. No additional components required.

Why Choose the 1027 Auxiliary Indicator for Trucks?

3000mm Cable for Extended Loom Runs

Most side repeater lamps ship with 300mm cables — useful for standard cab configurations, useless for trailers and long-body vehicles. The WAS 1027 side marker lamp ships with a full 3000mm cable. That’s the specification that makes it the correct unit for applications where shorter alternatives simply don’t reach. According to WAS’s official product range, the 1027 is specifically positioned within their catalogue for extended-reach commercial vehicle applications.

Dual-Voltage 12V–24V Without Modification

One unit covers your entire mixed fleet — 12V light commercials and 24V heavy trucks alike. Internal regulation handles the voltage differential automatically. No resistors, no relay modifications, no separate SKUs for different vehicle types. That single-SKU approach reduces stock complexity and eliminates the risk of fitting a mismatched voltage unit.

LED Reliability on High-Mileage Vehicles

A truck covering 150,000 kilometres annually puts enormous cumulative stress on electrical components. LED lamps handle that far better than filament alternatives — lower heat output, lower current draw, and a substantially longer service life. The DVSA MOT Inspection Manual for HGVs, published at gov.uk, classifies side indicator failure as a Major defect. Fit a unit that lasts.

Buy 1027 Auxiliary Indicator for Trucks Online

At £49.99 with same-day despatch, the WAS 1027 auxiliary turn signal unit is in stock and ships across the UK and EU today. Genuine WAS manufacturer stock — not pattern parts, not grey imports. Order now and clear the fault before it becomes an MOT failure or a roadside prohibition notice.

Installing the 1027 Auxiliary Indicator for Trucks

Step-by-Step 1027 Fitting Guide

1. Isolate the vehicle’s electrical system completely before starting work.
2. Remove the failed side repeater — quarter-turn clip or two fixing screws depending on body type.
3. Disconnect the wiring connector from the old unit and remove it from the aperture.
4. Route the 1027’s 3000mm cable to the vehicle loom connection point — secure the cable run with appropriate clips to prevent chafing.
5. Connect to the vehicle loom — confirm polarity before seating the connector fully, as LED circuits are polarity-sensitive.
6. Seat the new WAS 1027 LED indicator assembly into the aperture and secure all fixings.
7. Restore vehicle power and test both indicator directions.
8. Confirm normal flash rate — hyperflashing after fitting points to a wiring connection issue, not a faulty unit.

FAQs —

Why does the 1027 have a 3000mm cable when most side repeaters use 300mm? The 3000mm cable is designed for trailers, long-body rigids and vehicles where the indicator loom connection point is located far from the repeater mounting position. Standard short-cable units physically can’t reach in these applications.

Does the 1027 work on both 12V and 24V systems? Yes. Internal voltage regulation covers the full 12V–24V range without any modification or additional components. One unit works across your entire fleet.

Does one part number cover both sides? Yes. The 1027 auxiliary turn signal unit fits both nearside and offside positions. No separate left and right part numbers.

Will a dead side repeater fail an HGV MOT? Yes. A non-functioning side indicator is a Major defect under DVSA inspection criteria. It must be repaired before the vehicle is presented for test.

Complete the Service — Related Parts to Check

• Front amber indicator lamp
• Rear combination lamp cluster
• Flasher relay unit
• Indicator wiring loom connectors
• Side marker clearance lamp