Nissan Repair: Brake lights, brake light switch, trailer harness

Question
Hi Von -

This is Calvin, your fellow Nissan expert. I guess not so much an expert now, as I wanted to ask your opinion.

2003 Altima. Brake light always stays on. I have replaced the rubber grommet, checked the brake light switch. I even removed the brake switch connection and the light still remains on, so I know it is not the switch. Someone told me that it was the cruise control switch, I disconnected that, and same deal.

The 3rd brake light bulb is also burned out. I am in the process of replacing that, could that light (being burned out) be the cause of the problem, I was thinking maybe it is wired that way to alert the driver? Kind of reaching for that one though, LOL.

Would appreciate your thoughts on this -

mahalo and aloha
calvin


Answer
Calvin,

If it is not the brake light switch then the master headlight switch is the only other place all the wires tie together.  That is, unless you have a trailer harness shorting in the back of the car.  I would replace the third brake light but that should have nothing to do with the problem.  Email me back and let me know how it goes.