Common Issues with Toyota Tundra Tail Lights
Just like the other automotive lights on your pickup, the tail lights of your Toyota Tundra should be kept in good condition to prevent road accidents. And just like the other lights, they will soon wear out through constant use. When you already notice that the tail lights of your truck are not functioning properly, it is time for you to do some troubleshooting. Here are some of the usual problems you could experience:
The parking brake lights stay on.
There are several causes why the parking brake lights of your pickup stay on. The first one is the low brake-fluid level in the reservoir. The parking brake light serves as a low brake fluid warning, so this is a possible culprit why the light remains on. However, if the fluid level is at maximum, then another cause of the problem could be the tail light switch. Foreign objects may have blocked the switch which cause it to malfunction, or the switch itself has become faulty. You should diagnose the switch and the connecting wires to find the problem.
When the headlights are on, the brake lights don't work.
A possible reason for this problem is the wiring of the tail lights. You should check the supply voltage of the tail lights and stop lights because they are wired together. You should also look for signs of corrosion on the wires. It is important that you have the correct wiring diagram of your vehicle to see if the wiring of the headlights is connected with the tail lights beacause the headlight may have a different problem.
The tail light dims when the brake pedal is used.
If you have recently replaced the tail light bulb of your truck, then the new bulb can be the possible culprit. You can try to put the old bulb back, if it still has power left in it, to see if it still dims when you step on the brake pedal. However, if the old bulb is out, then you can swap the bulb from the other tail light. If it works properly, then the new bulb could have a different wattage. You should also perform a quick checkup on the battery because it may be low on power.