DO I HAVE CK OR STANDARD WIRING?

Comparing the Standard and CK Bulb Sockets

As seen in 3157CK, 3157SACK, and 3157SRCK, CK is also known as SCK, SACK, or SRCK.

Few cars from select manufacturers manufactured in specific years employ CK wired sockets. Occasionally, the wiring design used to power specific turn signals and brake light bulbs varies among auto and truck manufacturers. Normally, the "CK" type wiring has positive and negative terminals on either side of the lightbulb.

The conventional sockets found in the majority of Japanese and American cars are similar to CK/SRCKs, although they are wired differently:

These two wire setups are found on 3157 or 7443 types of bulbs. Some LED lights come with specific circuitry that enables them to function with both kinds of sockets.

CK wiring or standard wiring can be used with the GTR Lighting Armor Series LED lamps.

Particularly the GTR Lighting Carbide CANBUS LED bulbs. When buying carbide CANBUS lamps, you must determine whether you have standard or CK-type cabling.

The only change is the location of the contacts in the socket. Only a multimeter test will reveal the difference between the sockets and the bulbs, which appear to be identical!

The protection circuit fuse may blow if an incompatible bulb is installed; in that case, you will need to replace the fuse and install the appropriate bulb. It depends on the car, but sometimes using the wrong bulb will not operate appropriately without blowing a fuse.

How to Determine the Type of Your Socket

1. SEARCH ON GOOGLE OR YOUTUBE FOR VEHICLE-SPECIFIC INFORMATION.

Chances are, someone has already determined if your vehicle needs a CK or a regular-style bulb. The likelihood that it has already been worked out is higher if your car is more well-known. Using your year, make, model, and specific keywords like "LED," "CK," "C/K," "Turn Signal Bulb," or any other relevant keywords you can think of; we advise you to conduct some research on Google, YouTube, vehicle-specific Facebook groups, or discussion forums on vehicle-specific websites.

2. DO YOUR TESTING!

You must always conduct your testing regardless of the results of your research. Your car's manufacturer can have altered the socket style from one month of production to the next, or someone might have given inaccurate information! No clear explanation for why one car has standard sockets and another has "CK" style sockets appears to exist.

Based on our observations, CK-type front turn signal sockets are found in many Toyota automobiles. Occasionally, you may notice that two metal terminals are directly connected inside the socket; this indicates that these are the shared CK-style ground terminals. The ground terminal locations can occasionally be determined by looking at the wires on the socket's back. The type still needs to be confirmed by a test.

Additionally, you can tell if your original bulb is CK or standard by looking at the bulb base; most CK bulbs will say SRCK.

A digital multimeter is what we advise using for the testing, however a test light can also be helpful. We recommend hiring a certified and trained technician to help you choose which kind of LED bulbs to buy if you are not one yourself.

If all tail light bulbs are not removed prior to testing, a "false ground" reading will occur in the brake circuit.

It is necessary to test your sockets prior to buying new LED bulbs from GTR Lighting.

The following list of potentially verified cars with CK-type plugs is provided:

Brake lights for Scion XB models 2008–2015: 7443SRCK

Ford C-MAX exterior brakes and tail lights, 2013–2015: 7443CK

Front turn signals for the 2005–2010 Honda Civic COUPE (not sedan): 3157CK

The front turn signals of the 2010 Toyota Corolla are 3157CK.

Front turn signals for Toyota Tacoma models 2005–2015: 4157CK

Front turn signals for Toyota Tundra models 2006–2019: 4157CK

Nissan Maxima front turn signals from 2009 to 2014: 3157CK

Signals for the 2004 Acura MDX front turn: 3157CK

Turn signals in front of a 2005 Nissan Pathfinder: 3157CK

Terra 2005 front turn signals: 3157CK

Turn signals on the front of a 2007 Toyota Camry: 3157CK

Turn signals on the front of the 2008 Ford Escape: 3157CK

Toyota Avalon front turn signals for 2011: 3157CK

Honda Accord Coupe front turn signals for 2013–2015: 3157CK

Turn signals on the front of the 2018 Subaru Cross trek: 7443CK

Turn signals for the front of the 2018 Land Rover Discovery: 7443CK