Expert Answers about Mazda CX-7

• Trailer Drivers Side Tail Light Not Working, All Other Lights Work
• This sounds like a ground issue. Ground problems normally show up when there is more draw on a system such as when you have the running lights on and then use another function like a turn signal or brake light. Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside and out. The main connector grounds should be attached to clean and corrosion free bare metal surfaces. The light grounds should also be attached to clean and corrosion free bare...
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• No Power on Curt Trailer Wiring Harness on a 2007 to 2012 Mazda CX-7
• Trailer wiring harnesses # C55593 for the Mazda CX-7 will only fit if the vehicle came with the factory tow package. It sounds like your model did not. What you will need to add trailer wiring is a different type of harness, # 118405. It is possible that even if you ran a power wire to the battery manually and bypassed that connector it might still not work. going with harness # 118405 would be the sure thing.
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• 2011 Mazda CX-7 Taillights Flicker After Installing Replacement LED-Type Bulbs
• Both the stop and tail light bulbs used on your 2011 Mazda CX-7 are the 7443 type as you noted. We offer this bulb type in both halogen versions like # P217443B (possibly what you had originally) and in LED types like the Putco # P237443R360. LEDs are very high efficiency lights that can sometimes light up from even the low-level residual current in vehicle or trailer wiring. Load resistors that will correct the flicker. Use one per bulb. We offer # DI34ZR.
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• Right Side Trailer Lights Not Working on Trailer Towed by a 2011 Mazda CX-7
• This sounds like a bad ground problem if it is just the one side. The first thing you should do is unplug the trailer and use a circuit tester like # PTW2979 if needed to test the 4-Way on the vehicle. If all of the functions are working fine on the 4-Way then you know the problem is somewhere on the trailer. If the 4-Way is not functioning correctly then test the wires going into the converter box from the vehicle. If they are not correct then the problem is on the vehicle and will need...
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