Is this an alternator problem?
Is this an alternator problem?
Today is my lucky day. After I got home tonight, my 94 maxima would not start. My car behaved strangely on the way: first, I noticed the air conditioner was on and off by itself and the AC control panel light was off; I heard noice from the radio; the engine ran weirdly sometimes; I heard noice from passenger side front once a while; the car would not start and the head light was dim. After I charged the battery, I can start the car, but not difference in voltage with and without engine running. I measured the voltage at the output on the alternator, the same.
It seems like that it is the alternator problem? what else could contribute to the above observation?
It seems like that it is the alternator problem? what else could contribute to the above observation?
Senior Member
Joined: Oct 2004
Posts: 1,205
From: Pretoria - South Africa
It is the voltage of the battery.
Working alternator or not, if the wiring is left as designed, that will always be the case.
What is the actual voltage measured with the engine running and headlight switched on - less than about 13.4V at idle could be a faulty alt - any engine rpm above that should have the alt output at around 14V+ and the battery only 0.1 or so lower if all the cabling and connections are in good condition.
Originally Posted by LvR
Doh
Working alternator or not, if the wiring is left as designed, that will always be the case.
What is the actual voltage measured with the engine running and headlight switched on - less than about 13.4V at idle could be a faulty alt - any engine rpm above that should have the alt output at around 14V+ and the battery only 0.1 or so lower if all the cabling and connections are in good condition.
Working alternator or not, if the wiring is left as designed, that will always be the case.
What is the actual voltage measured with the engine running and headlight switched on - less than about 13.4V at idle could be a faulty alt - any engine rpm above that should have the alt output at around 14V+ and the battery only 0.1 or so lower if all the cabling and connections are in good condition.
Originally Posted by doodoodoo
The alternator is bad. I bought one from advance auto part for 80 dollars and replace it tonight. Now the voltage at idle is 14.2 V, is this normal or too high?
I miss my VE
Joined: Apr 2005
Posts: 2,553
From: NY
Originally Posted by doodoodoo
The alternator is bad. I bought one from advance auto part for 80 dollars and replace it tonight. Now the voltage at idle is 14.2 V, is this normal or too high?
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