Alternator Issues

[fly fisher]

Hi,
I have an issue with the Alternator on my Morgan, its a Ford XR3 engine, so ford bit..

The battery isnt charging, but is is sending a voltage back to the battery, about 9 volts.

Is it likely knackered, but as it is sending some power could it be the earthing?
Will

[MangledMetal]

Could be either mate.
It's got to be worth a look at the body and engine earths, it's free after all. Give em a clean up and a bit of copper grease!

In my opinion, it's more likely to be the alternator tho.

[Mr2Mike]

Does the charging light illuminate with the ignition on, and fully go out with the engine running (not just glow dimly)?

[muley]

It should be sending around 14.1 volts IIRC

[fly fisher]

The ignition light has been a bit tempermental, has flickered on and off... Now the battery is dead it doesnt go on at all..

[littleredrooster]

9 volts sounds like it's only got half-wave rectification - your diode pack in the alternator is buggered.

In certain alternators, the diode pack is replaceable separately, but it's a fair bet that if it is knackered, other components inside the unit won't be far behind. A service exchange unit shouldn't be too expensive.