Alternater had it?
06-05-2007, 09:58 PM
#1
Alternater had it?
My saph has been stood for about 3 weeks without being run and when i came to start it the battery was flat. Jumped it off and went out for a decent run, kept having issues with the radio turning itself off. Once i got it home, parked on front, went out to it an hour or so later and it was flat. Although it turned over.
Charged the battery over night, started this afternoon and all was well, secs moniter was reading 13-13.3V at idle. Held charge all afternoon then i've taken it out tonight and the voltage is dropping, with lights on and radio on it shows around 12.5V but when fans kick in it's dropping to 11.5Vish.
Does that sound right to assume the alternater is on it's way out?
Charged the battery over night, started this afternoon and all was well, secs moniter was reading 13-13.3V at idle. Held charge all afternoon then i've taken it out tonight and the voltage is dropping, with lights on and radio on it shows around 12.5V but when fans kick in it's dropping to 11.5Vish.
Does that sound right to assume the alternater is on it's way out?
06-05-2007, 10:51 PM
#2
Glennvestite
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Can u get hold of a multi metre n check ur alternator 2 c if its charging.Visually check all ur wires on the battery n alternator first.It sounds like it cud b the alternator at fault though.
07-05-2007, 06:16 AM
#4
The engine cannot turn over if the battery is flat, as this is what powers it!!
If you are having electrical problems yet your engine turns over it is not the battery causing them.
Fully charged and running wants to be a little at around 13.8-14.2 volts no load at idle.
Next with it still idling put al lights etc on and especially HRW and then raise revs to 2000rpm then it should read at least 12.8 or very close.
The diodes could be starting to leak in the rectifier pack, these stop AC signal from getting to the battery which the alternator produces as well as of course converting the feed to DC for battery.
When these leak they allow current flow from battery to alternator, ie the other way around.
It could be a duff battery causing it try charging the battery then leavingit disconnected for a day, then reconnect and see if it is ok.
A simple and cheap way to check for current flow with everythingoff is to use a small bulb temporarily between a battery terminal and it's lead, any current flow will illuminate the bulb, anything more than a faint drizzle is not right, make sure doors are shut though!!
tabetha
If you are having electrical problems yet your engine turns over it is not the battery causing them.
Fully charged and running wants to be a little at around 13.8-14.2 volts no load at idle.
Next with it still idling put al lights etc on and especially HRW and then raise revs to 2000rpm then it should read at least 12.8 or very close.
The diodes could be starting to leak in the rectifier pack, these stop AC signal from getting to the battery which the alternator produces as well as of course converting the feed to DC for battery.
When these leak they allow current flow from battery to alternator, ie the other way around.
It could be a duff battery causing it try charging the battery then leavingit disconnected for a day, then reconnect and see if it is ok.
A simple and cheap way to check for current flow with everythingoff is to use a small bulb temporarily between a battery terminal and it's lead, any current flow will illuminate the bulb, anything more than a faint drizzle is not right, make sure doors are shut though!!
tabetha
07-05-2007, 10:12 AM
#5
I'm pretty sure there is no drain on the battery and it's holding charge mate. Off out to check in a bit though.
The voltage isn't as high as that though, highest is 13.3 volts at idle with no load. And it drops down the longer you use the car, when surely it should be charging
The voltage isn't as high as that though, highest is 13.3 volts at idle with no load. And it drops down the longer you use the car, when surely it should be charging
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