Can someone please tell me what this part does?

[big_fletch]

Your on the ball there evil, I'm guessing you are a auto-sparky as well lol..
Anyhow ill second your post evil, good one mate

[the evil twin]

Your on the ball there evil, I'm guessing you are a auto-sparky as well lol..

Not an Auto Sparky as such but a few qualies in a closely related field. A good Auto Sparky will know a sight more than me but its good to try and rule out the easy bits if ya can... plus I've never had the honour of tinkering with 24 Volt Patrols so could be minor but distinct differences I am not aware of... still use Hitachi Alternators I spose but maybe not

[big_fletch]

Not an Auto Sparky as such but a few qualies in a closely related field. A good Auto Sparky will know a sight more than me but its good to try and rule out the easy bits if ya can... plus I've never had the honour of tinkering with 24 Volt Patrols so could be minor but distinct differences I am not aware of... still use Hitachi Alternators I spose but maybe not

Ah ok then lol, not very many differences, same basic principles.. But you know your stuff mate so must be a VERY closely related field lol

[the evil twin]

Ah ok then lol, not very many differences, same basic principles.. But you know your stuff mate so must be a VERY closely related field lol

ROFL... yeah Fletch the 'vehicles' I worked on for 20 odd years had wings and a few more horses out of the engines than a 'Trol but as you say the principles don't change only the specifics.

Lucky I retired from being around things with guns and bombs a lot of years ago now... there seriously are some deserving targets errrr people out there who really do deserve a special airmail delivery in this modern world of ours. We have forgotten a few valuable lessons learnt in the past but thats for another thread I reckon

[big_fletch]

ROFL... yeah Fletch the 'vehicles' I worked on for 20 odd years had wings and a few more horses out of the engines than a 'Trol but as you say the principles don't change only the specifics.

Lucky I retired from being around things with guns and bombs a lot of years ago now... there seriously are some deserving targets errrr people out there who really do deserve a special airmail delivery in this modern world of ours. We have forgotten a few valuable lessons learnt in the past but thats for another thread I reckon

Haha yer I reckon mate, I can barley read my phone in so drunk... ll

[Yendor]

Thanks mate, I've already done that. Reads 8-9v regardless if the truck is off or running or with a load. I just need to figure out where I put what probes on the alternator so I can test what's being put out straight from there instead of what the batteries are up to. If you could let me know that would be great mate

Hi HippoNZ.

The alternator will have 3 wires going to it (possible 4 if it has an earth going to the body of the alternator, black wire).

Two of the wires will go into a plug that connects to the alternator.

The last one is a heavy gauge wire (from memory white wire) this is the wire that supplies the charge to the batteries when the alternator is charging, this wire is connected to the alternator via a nut.

To test alternator output, start vehicle, bring revs up to a fast idle, now with your volt meter put the negative lead to a clean spot on the block and the positive lead to the heavy gauge wire.

If you alternator is charging it should read somewhere between 26-28 volts.

As per the evil twins post you need to make sure the alternator/ battery light in the dash comes on when the ignition is turn on and then goes off when the engine has started.

How are you starting the vehicle? from it's own batteries or do you have to jump start it?

Make sure the battery in your volt meter is not flat, this can cause the volt meter to read out.

Also I would recommend if you are running any 12 volt accessaries from one battery, to remove these and get yourself a 24-12 volt reducer.

Hope this helps.