• LED light bar loom cable 3M
  • LED light bar wiring harness kit 3 metres
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AutoSmart Parts

LED Light Bar Wiring Harness Kit, 3M 40A Loom Cable with Rocker Switch and Fuse Relay

LED light bar wiring harness kit 3 metres long. 40A with rocker switch, fuse and 12V relay. For driving lights, work lights, and offroad LED bars.

$59.99 AUD
$75.99 AUD $59.99 AUD
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check Complete kit: harness, relay, switch, fuse, spares
check 3 metres of high conductivity cable for any install
check 40A capacity supports up to roughly 480W LED at 12V
check Laser etched rocker switch looks great on dash

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Specifications

Cable length: 3 metres
Current rating: 40A
Voltage: 12V DC (also works on 24V)
Switch: 5 pin on off rocker, laser etched, mouse style
Relay: 12V DC automotive
Fuse: Inline blade fuse with 3 spare fuses
Cable quality: High conductivity, heat and melt resistant

Compatible With

Vehicles: 4WDs, SUVs, trucks, ATVs, UTVs, boats, anything 12V
Light types: LED light bars, driving lights, work lights, fog lights, spotlights, beacons
Max load: Roughly 480W of LED lighting at 12V (40A x 12V)

What’s Included / Care Instructions

What's included:
• 1 × 3 metre wiring harness loom
• 1 × 12V DC automotive relay
• 1 × 5 pin on off rocker switch (laser etched)
• 1 × inline blade fuse holder with fuse
• 3 × spare blade fuses

Care:
• Run wiring through grommets to avoid chafing
• Keep relay and switch in dry locations
• Check fuse first if lights stop working

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Install Guide

1. Disconnect Battery

Disconnect the negative battery terminal before any wiring work to prevent shorts.

2. Wire the Relay and Fuse

Connect the relay near the battery: 30 to battery + (fused), 87 to LED light positive, 85 to switch, 86 to ground. Mount the rocker switch on your dashboard.

3. Run Cable, Reconnect, Test

Route the 3m cable through firewall grommet to your LED light bar. Reconnect battery. Flip the switch and test the lights.

Common Questions Before You Buy

What size LED light bar will this run?
40A at 12V supports up to roughly 480W of LED lighting. A 50 inch dual row LED light bar is typically 250 to 300W, so this kit easily handles a single light bar plus extras like spotlights.
Is 3 metres long enough?
Yes for most installs. 3m covers battery to bullbar LED bar, or battery to roof rack for most 4WDs and SUVs. For larger trucks or rear lights, consider extension.
Does it come with switch and fuse?
Yes. Complete kit: 3m harness, 12V relay, 5 pin laser etched rocker switch, inline blade fuse, plus 3 spare fuses.
Can I install it myself?
If you have basic car wiring experience, yes. Takes about 1 to 2 hours. If unsure about wiring relays or running cable through the firewall, an auto electrician can fit it in under an hour.
Does it work on 24V trucks too?
Yes, also rated for 24V systems. Common in larger trucks, boats, and some 4WDs.