Usage of resistor on led headlights and taillights

 

Extend the life of  your led headlight and cancel any dashboard error

Designed for trucks and SUVs.

 

A common issue that we have is that led headlights are designed to work on a normal voltage of 12 volts.

Most vehicles with a large engine size 3 Litter engine will have an average voltage of 13.5-14.2 volts and sometimes higher if it has alternator issues.  This causes the led after-market headlights to overheat and shorten the expected life of the bulb significantly.

To resolve this issue SMD lighting has assembled a wiring harness that reduces the voltage by an average of 2 volts, keeping the led at lower voltage and reducing the overheating. Giving the aftermarket led bulb a longer life.

The harness is built with a load resistor that is designed to allow aftermarket LED Headlight bulbs to work flawlessly with new vehicles computer self-testing system, it will cancel the error on the dashboard and any flickering.

Installer tip- please make sure the load resistor is connected to a metal part it gets extremely hot and may melt any plastic it is in contact with.

 

 

 

Drawing #1

H13 Cancelor harness with voltage drop-down  digram

Drawing #2

H7,h11,9006,9005 Cancelor harness with voltage drop-down  digram

 

 

Before we plug up the wiring harness we need to test the bulb we are installing if its consumes  1.2 amp - 2.2 amp/ 12 volts and below we will use the harness the way it is. (drawing 1&2)

if the led is consumed at higher amps we will need to determine if we need higher or lower resistance to cancel the computer error (by removing the load resistors 4 or 8 ohms) we do not want to overload the wiring with high resistance if not needed.

If you are not sure please call our technical support to help you decide