LED Headlight Upgrade Flickering (or only half illuminated)

PROBLEM: MY LED LIGHTS ARE FLICKERING OR ONLY PARTIALLY ILLUMINATING.

LED flickering, hyper-flashing, or only partially lighting up is usually a sign of low input voltage. Unlike halogen headlamps which will simply dim with the low input voltage, LEDs will flicker, and in the case of light bars or driving lights - only some of the LEDs will light up.

1. Use a multi-meter to test the input voltage (the application’s output voltage). Anything lower than 10.5v could result in flickering. 
2. If only one side of the headlamp is flickering, swap the LED driver (the little black box) over to the other headlamp. If the problem still stays on the same headlamp, there is a low input voltage problem caused by the vehicle's circuit on that headlamp which will need investigating.  If the problem shifts to the other headlamp, the LED driver may be defective, please lodge a Warranty Request. 
3. Power the light or light bar directly from the vehicle battery, to ensure a high resistance join in the wiring is causing a voltage drop.

COMMON CAUSES OF FLICKERING LED

The most common reason we encounter is the vehicle's battery supply voltage is reduced. This could be a result of either dead cells or due to the fact that the battery is getting to the end of its life cycle. We recommend you have your battery tested and replaced as required. 

The second but more uncommon reason is that the vehicle headlight circuit is causing a restriction to the supply voltage. This will need to be investigated by a qualified auto-electrician. 

Jeep owners:
Flickering can be the result of Jeep’s PWM circuitry, also known and as hyper-flashing. To alleviate this, please use our H4 Error Decoder