The Difference Between CK Style LED Bulbs and Regular LED Bulbs

If you have a 7440/7443 or a 3156/3157 LED bulb, you plug it in and it doesn't work right, it's dim or it smokes and/or pops a fuse, you might have a vehicle that uses CK style wiring. Click the link to learn more!

If you put in an LED blinker bulb and it gets hot or blows a fuse, you've probably got CK style circuit wiring! Have you ever installed a wedge base bulb like a 7443 or 3157 and when you turned on the lights they either got really hot or blew a fuse? Sometimes a car manufacturer will wire their light bulbs a different way than what is considered to be conventional. GTR Lighting is one of very few companies who offers the 7443 and 3157 LED bulbs in white, red, and amber - but in the CK style lighting. Below is a list of vehicles that use CK style circuits.