Battery charging/alternator problem

[Teg]

Hi all

My s2 does not charge the battery when running. But there is no warning light on the dash.

Car has been stored by previous owner for 6/7 years but the battery is quite new. If I charge the battery off another car it holds charge fine but once the car is running you can see the voltage slowly dropping off.

Any suggestions appreciated.

Thanks

Ben

[Audicted]

Voltage regulator on Alternator may be bad.

[Mikes2]

Is the battery bulb coming on when you switch on the ignition ?

This is required for the alternator to charge as it completes the circuit for the blue exciter wire

[Teg]

Yes the bulb comes on when I turn the ignition on.

Put a multi meter on the alternator which appears to only be sending out 8.7v. So think it's just the alternator not giving enough charge?