Nissan Repair: 1999 Nissan Altima brake & battery lights on, nissan altima, navie

Question
Hi Dinger,
The brake and battery lights keep coming on in my 1999 Nissan Altima. I took the car to my mechanic and he can't anything wrong with the car. I asked him if the problem was the brakes or altenator. He said the brakes were fine and the alternator was charging. I asked if it could be a bad diode pack and he said that that was for older model cars. Do you have any idea why these warning lights keep coming on.

Thank you,

Peter

Answer
HI Peter,

Check to see if your brakes lights are staying on. This would mean a bad brake switch and will drain the battery. This is the only thing I can think of that would make both come on at the same time. Unless you are experiencing two problems. If these two lights are on there should be a Diagnostic Trouble Code stored in the vehicles computer. If you could retrieve that code, it would be real helpful.

Peter,

It's a bad alternator. Had one in here this week, took 4 days for my guys to listen to me! LOL His brake light was on, transmission light flashing, battery light, crazy stuff going on, but we installed a new alternator and that fixed it. I am extremely curtain this will fix your issue.

I saw you mentioned you were going to wait a bit to replace the alternator. I suggest you do it as soon as possible because it is causing other systems to compensate. When I replaced my alternator in my navie, it got 2.5 better miles to gallon. Just as an example... Just trying to help, I would hate to see something else go out on you.