Service manual

SERVICE MANUAL - 1975 SCORPION BRUT
VOLTAGE REGULATOR CHECKS
(
1
1. Resistance across regulator
(_)
c
Two most common catastrophic failure modes of the regulator may be identified by simply
checking the resistanc e of the regulator.
a. Burned out sensing element.
Normal resistance across the regulator is approximately 155 - 160 . The symptom of a
burned out sensing element is a sig nificantly increa sed resistance reading.
b. Shorted SCR.
Shorted SCR is characterized by a sign ificantly reduced resistance reading.
2. Set point check
Use test circuit as shown below . Read voltage across regulator. Value should be 13.8 ±
.5V.
120V
100W
5..n.
REGULATOR SET POINT TEST CIRCUIT
FIG. 3-15
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