Description
Eliminate unwanted indicator cross-flash when upgrading to LED bulbs with the plugpal LED Indicator Diode Harness with Crimps. Designed for classic cars and motorcycles with negative earth wiring, this harness prevents the common “sympathy flash” issue caused by low-current LED indicator conversions.
What Is “Sympathy Flash”?
On vehicles fitted with a single dashboard indicator warning (tell-tale) light, switching to LED indicator bulbs can cause both left and right indicators to flash together—similar to hazard lights.
This happens because LED bulbs draw very little current, allowing electricity to backfeed through the dashboard warning lamp to the opposite side.
If your indicators operate normally when you remove the dash warning bulb, this diode harness is the simple, permanent fix.
How the plugpal LED Indicator Diode Harness With Crimps Fixes the Problem
The harness uses high-quality diodes to:
- Prevent reverse current flow between indicator circuits
- Stop unwanted cross-flashing
- Restore correct left/right indicator operation
- Maintain proper dashboard tell-tale function
A quick and convenient solution for classic LED indicator conversions.
Product Features
- Suitable for negative earth systems only
- Designed for classic cars and motorcycles
- Durable ABS enclosure
- PET braided cable sleeve for added protection
- Adhesive-lined heat shrink for moisture resistance
- Waterproof cable crimps included (if re-termination is required)
- High-quality components throughout
Simple Installation
- Two leads connect to the existing wires feeding the dashboard tell-tale bulb
- Single output wire connects to the bulb
- Supplied earth lead grounds the bulb correctly
- Waterproof crimps included if existing wiring needs to be cut and re-terminated
This is a universal LED indicator diode harness, so wiring colours in your vehicle loom may differ from any example diagrams.
Instructions are available here.
The Essential Upgrade for Classic LED Indicator Conversions
If you’re converting your classic car or motorcycle indicators to LED and experiencing cross-flashing, the plugpal LED Indicator Diode Harness provides a reliable, professional solution.
Restore proper indicator operation and eliminate sympathy flash quickly and effectively.
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