1995 Nissan Maxima Lights are on dash

Tiny
SHIELAKAY
  • MEMBER
  • 1995 NISSAN MAXIMA
Electrical problem
1995 Nissan Maxima 6 cyl Automatic? Miles

Just had alternator replaced - battery only 3 months old. When they replaced the alternator, now dash light shows for battery and BRAKE. Is there some kind of reset button?
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Tuesday, October 5th, 2010 AT 5:39 PM

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Tiny
CMDRDATATX
  • MEMBER
Was the alternator installed properly and the belts tensioned? Those lights indicated that the battery is not being charged. If you have access to a voltmeter, heck the voltage at the battery terminal with the engine running at idle or slightly higher. It should show around 13.5 to 14 volts. If it is at or near 12-12.5 volts, then the alternator is not providing charging voltage to the battery, and thus the dash lights.
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Saturday, October 9th, 2010 AT 1:30 PM
Tiny
SHIELAKAY
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Shows 13.5 when tested.

We are concerned that both battery and brake lights are one. Car runs fine, starts right up, air conditioner works, brakes work, emergency brake is not engaged so that can't be the cause for that light. Is there some kind of reset after installing the alternator? Please note, the guy had to redo it when he initially installed it because he had the wires backwards into the alternator.
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Saturday, October 9th, 2010 AT 2:45 PM
Tiny
CMDRDATATX
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Well, thats good news on the 13.5V measurement. It is the correct charging voltage. I hope that the initial mis-wire did not do any damage to the sensing circuitry (usually a voltage sensing circuit consisting of Zener diode and transistor or integrated circuit within the computer box), if it does, you're in for a big expense that perhaps not worth correcting. I don't recall of any reset for this warning, but try disconnecting the battery for about 15 minutes or longer, and reconnect it (I say 15 minutes, but if you're not in a hurry, I'd leave it off for an hour). This should erase any engine error code stored.

While doing so, check any visible electrical plugs near the alternator, making sure they are secure and plugged in tight. Good luck.
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Sunday, October 10th, 2010 AT 12:29 AM

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