Hi! I am Sarath from Sri-Lanka. My car is a Nissan Presea R 10.
My problem is when I drive, especially in late evenings, I find head lights are blinking like. Moreover, battery light indicates very often when the engine is on. I brought the car to a technician, and he says, battery is overcharging, exceeding 14 V . Further he said it may be due to some problem with the alternator.
Also last night I found wipers were moving very fast, even at level one.
Could some technically competant gentleman answer my problem to solve this out?
2006-10-31 02:37:04 · 12 answers · asked by Jim 1 in Cars & Transportation ➔ Maintenance & Repairs
If your technician diagnosed it at exceeding 14V, I'd have to agree with him that you're alternator is putting out excessive voltage and that it is highly likely that something inside the alternator (ie voltage regulator) is not working appropriately and it may damage or has already damaged the battery.
Are you asking because you don't believe your technician is competent?
2006-10-31 02:41:36 · answer #1 · answered by hsueh010 7 · 1⤊ 0⤋
Well my friend, looks like you do have a problem with your alternator. The reason for this is that your alternator is about to die. Basically, what happens is that the surge in power means that the coils and such inside the part are about to go. So, it starts to overcharge. Look at replacing the alternator or having it serviced.
Furthermore, there could be a short somewhere in the circuit, although I doubt it. Also, make sure that you are using the correct battery for your car's engine. It could be that the battery you are using is too big for your car.
2006-10-31 02:43:40 · answer #2 · answered by Nestor Q 3 · 1⤊ 0⤋
The charging system should bring the battery close to 14.5 that is normal. But if it is 15 volts then you need a new battery because it is very dangerous to have a battery taking a charge that high. Other than the other problem I am not real sure unless I looked at it my self, sorry but I hoped this helped any. Good luck
2006-10-31 03:07:32 · answer #3 · answered by brian m 2 · 0⤊ 0⤋
It is your alternator. An alternator converts AC to DC and there are diodes inside the alternator that accomplishes this. Diodes are one way electrical check "valves". If even one diode is bad, it will cause lights (headlight, interior lights) to blink because the current will pass as DC, DC, then AC. And this will repeat. I am positive it is your alternator. Check the tension of the belt once you've replaced it.
2006-10-31 02:46:07 · answer #4 · answered by Mowgli 2 · 0⤊ 0⤋
first...all alternators charge anywhere between 18 and 20 volts at idle. it must be regulated to 13.8 volts to keep from over powering your computer components and your battery. when it overcharges, it can burn circuts and destroy your battery. it will need a new regulator, which is inside your alternator. in other words, your alternator will need replacing.
the alternator charges at 18 to 20 volts at idle and the regulator reduces the output voltage to a constant 13.8 volts. 13.8 volts is optimal charging for your battery.
2006-10-31 03:34:21 · answer #5 · answered by troy w 2 · 0⤊ 0⤋
your regulator is bad, think of it like an automatic on/off switch for your alternator, it turns it on when it needs to charge the batt, and turns it down or "off" when it dose not need charging, it regulates how much charge is going to the batt. you need to replace the alternator, or just the regulator if you know where to get one and have the know how of tearing apart the alternator and soldering it in. if you dont it could leave you with a dead battery, or could even blow up your battery if it charges too much, and blow fuses and possible ruin other electrical components.
2006-10-31 02:44:55 · answer #6 · answered by yfz450chuck 3 · 0⤊ 0⤋
Afraid this sounds like a faulty voltage regulator(located within the alternator). Sorry! Good luck! :-)=
2006-10-31 03:52:52 · answer #7 · answered by Jcontrols 6 · 0⤊ 0⤋
It may be the voltage regulator or the alternator.
You will need this repaired quickly as it may damage your electrical system and battery.
2006-10-31 02:40:55 · answer #8 · answered by Anonymous · 1⤊ 0⤋
If your alternator is putting out more than 15 volts you need to fix it before it damages all kinds of stuff.
2006-10-31 12:25:12 · answer #9 · answered by Nomadd 7 · 0⤊ 0⤋
the alternator could have a bad diode and be overcharging the battery. i would get this addressed ASAP
2006-10-31 02:44:27 · answer #10 · answered by Anonymous · 0⤊ 0⤋