Toyota Supra 1990 Manual page 383

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---
Ohmmeter
,Positive
(+)
Stud---IY
Rectifier
Term ina I
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Ohmmeter
CHARGING SYSTEM - Alternator CH-11
CH0247
CH0248
CH0465
CH0466
Brushes
1. INSPECT EXPOSED BRUSH LENGTH
Using a scale, measure the exposed brush length.
Standard exposed length:
10.5
mm
(0.413
in.)
Minimum exposed length:
[7M-GE
(MIT)]
1.5
mm
(0.059
in.)
If the exposed length is less than minimum, replace the
brushes.
[7M-GE (A/T) and 7M-GTE]
If the exposed length is less than minimum, replace the
brush holder.
2. [7M-GE
(MIT))
IF NECESSARY, REPLACE BRUSHES
(a) Unsolder and remove the brush and spring.
(b) Run wire of the brush through the hole in the brush
holder, and insert the spring and brush into the brush
holder.
(c) Solder the brush wire to the brush holder at the ex-
posed length.
Exposed length:
10.5
mm
(0.413
in.)
(d) Check that the brush moves smoothly in the brush
holder.
(e) Cut off the excess wire.
(f)
Apply insulation paint to the soldered point.
Rectifiers (Rectifier Holder)
1. INSPECT POSITIVE SIDE RECTIFIER
(a) Using an ohmmeter, connect one tester prove to the
positive
(+)
stud and the other to each rectifier
terminal.
(b) Reverse the polarity of the tester probes.
(c) Check that one shows continuity and the other shows
no continuity.
If not, replace the rectifier holder.