alternator bench test, alternator bench test Options

[goobstine]

can someone tell me where to hook my leads to bench test my alternator please ??

[Spoke]

In the diagram below, the main components of the alternator are shown. There's 9 diodes, 3 stator windings, and an armature. Pretty much the only component which can be isolated is the armature. The diodes and stator windings cannot be isolated to be tested separately.

If you want to do a bench test, then you have to set up a fixture to spin the alternator while checking voltages and the current capability of the alternator.

The diagram below can be used to do a bench test. Here's what you need to do to do a bench test:

1) Connect a battery between B+ on the alternator and the alternator case.
2) Do not install the voltage regulator.
3) Use the original wire harness to the voltage regulator connected to the alternator.
4) Short D+ and DF to put the alternator into maximum charge state.
5) Connect a GEN bulb as shown in the diagram.
6) Spin up the alternator to about 3k to 5k RPM; you should measure 16V at D+/DF to ground and B+ to ground.
7) The voltages between D+/DF and B+ should be within one volt of each other.

This will give a good indication of alternator health.