Alternator bench test

I have positive of the tester going to +B main terminal, and negative of the tester to alternator body.

Well you need to have a +ve control wire going to the alternator. This wire feeds the internal regulator. Unless it does not have an internal regulator in which case you will need an external one. Also connect the case to earth.

This will get it going so long as you can see which terminals to put the wires on to. I am no expert when it comes to exactly what the terminals are but if you take the alternator to your local auto sparky he should be able to just tell you which connector is for what. Some are pretty obvious but others can be a real pain.

Utemad

majaciem3@yahoo.com.au

yer do me too gandrATdatafastDOTnetDOTau, thanx

Is the alternator a bosch ? If it is and the 2 terminals you are talking about make a T, then it is an external regulator alternator. The top of the "T" is a D+ terminal and can be connected to the bottom of the "T", Which is called the F terminal. F can be joined to the B+ also, but connecting both together checks the exciter diodes for correct operation. It will not start to charge until about 3000 rpm give or take. If it does not excite at all, connect B+ to F and it should. These 2 wires normally go to the external regulator. By connecting it as above you have bridged out the regulator and the alternator will charge full current.
You would only run it like this a few minutes due to the heat generated. P = V X I, = 12volt time 50 amps = 600 watts.
If all else fails, take it to your friendly auto lecky. He has spent a whole life time explaining the above to customers.
Good luck.

Thanks to all of you.

Stuart nothing came yet. Can i trouble you again, try sending to
majaci@westnet.com.au

Guys,

I have sent again to all of you.