The Mazda B4000 tail light assembly is essential for your safety. However, problems do come up due to old age and the road conditions working against you. If you wish to lenghten the life span of your tail light assembly, then you better do some troubleshooting. Listed below are some of the common problems related to the part, and the causes behind them.
When one of your tail lights is out, it can be caused by one of the following: it could be a faulty bulb, a wiring mishap, or one of the brake components is broken. First check the bulb itself. You can do this by accessing the area under the trunk carpet and pulling out the electrical components. There, just unscrew the bulb and take a look at its filament. If it is broken, then a simple replacement should do it. If not, then go further down and inspect the wiring, especially near the tail light housing. If you see damage of any sort, then that might be the cause of your problem and a little electrical know-how is going to be used to solve it.
If the tail light is not even working in the first place, then it is more than a defective bulb or a small wiring problem. Instead of the trunk, open up your glove compartment and look for the fuse box inside. There, find the fuse that is labeled "tail light." If you notice that is blown is any way, then replace it with a new one.
Finally, when the tail lights in the assembly flicker on and off, the first thing you should do is it check if the bulb is installed correctly. Double-check if you put the bulbs correctly, and if not, then adjust them accordingly. Also, do remember that you cannot just install any type of bulb. It has to be of the correct wattage in order for it to work properly. The other thing to check is the amount of power the tail light assembly receives. Get a voltometer and measure the voltage. If it is not enough, then a different part of the car is at fault.