Ranger 2WD V6-182 3.0L (1995)
Alternator W/Integral Regulator Rectifier Short Or Grounded & Stator Grounded Test
1.
Using a suitable ohmmeter, connect one probe to alternator BAT (B+) terminal and the other probe to the STA terminal (rear blade terminal).
Then, reverse the ohmmeter probes and repeat the test.
^
A reading of about 6.5 ohms should be obtained in one direction and no needle movement with the probes reversed.
^
A reading in both directions indicates a bad positive diode, a grounded positive diode plate or a grounded BAT terminal.
2.
Perform the same test using the STA and GND (ground) terminals of the alternator.
^
A reading in both directions indicates either a bad negative diode, a grounded stator winding, a grounded stator terminal, a grounded positive
diode plate, or a grounded BAT terminal.
^
Infinite readings (no needle movement) in all four probe positions in the proceeding tests indicates an open STA terminal lead connection
inside the alternator.
