Table of Contents
Advertisement
6D-14
1977 PONTIAC SERVICE MANUAL
-
-
NO. 2 TERMINAL
I
"BAT"
TEI
Fig.
6D-17 27-SI
Generator
I
I
I A M P
BATTERY
DIODE TRIO
I
r--
--i
1
I
I
I
L + t ,
I
I
I
I
I
-
-
I
I
I
I
I
I
d
I
I
.
- 1
.
I
I
I
-
I
RECTIFIER
,
BRIDGE
I
Fig.
6D-18
Regulator in Charging Circuit
Do not polarize the generator.
Do not short across or ground any of the terminals in
the charging circuit except as specifically instructed.
NEVER operate the generator with the output
terminal open-circuited.
Make sure the generator and battery have the same
ground polarity.
When connecting a charger or a booster battery to the
vehicle battery, connect negative to negative and positive to
positive (see Charging Section).
NOTE: In some circuits (Rally Gage option), a
voltmeter may be used instead of an indicator lamp. In
this case, Section "A" pertaining to faulty indicator lamp
operation should be omitted from the troubleshooting
procedure.
Trouble in the charging system will show up as one or
more of the following conditions:
A. Faulty indicator lamp operation.
B. An undercharged battery as evidenced by slow
cranking and low specific gravity readings.
C. An overcharged battery as evidenced by excessive
water usage.
A. Faulty Indicator Lamp Operation
Check the indicator lamp for normal operation as shown
below.
If the indicator lamp operates normally, proceed to
"Undercharged Battery" section. Otherwise, proceed to one
of the following three abnormal
conditions.
1.
Switch Off, Lamp On- In this case, disconnect the
two leads from the generator No. 1 and No. 2 terminals. If
the lamp stays on, there is a short between these two leads.
If the lamp goes out, replace the rectifier bridge as covered
in the "GENERATOR REPAIR" section. This condition
will cause an undercharged battery.
2.
Switch On, Lamp Off, Engine Stopped- This
condition can be caused by the defects listed in Part 1 above,
or by an open in the circuit. To determine where an open
exists, proceed as follows:
a. Check for a blown fuse, a burned out bulb, defective
bulb socket, or an open in No. 1 lead circuit between
generator and ignition switch.
b. If no defects have been found, proceed to
"Undercharged Battery" section.
3.
Switch On, Lamp On, Engine Running check
for a blown fuse (where used) between indicator lamp and
switch, and also in A/C circuit. The other possible causes of
this condition are covered in the "UNDERCHARGED
BATTERY" section.
If a defect has been found and corrected at this point,
no further checks need be made.
B. Undercharged Battery
This condition, as evidenced by slow cranking and low
specific gravity readings or sealed battery test indicator dark
green, can be caused by one or more of the follow~ng
conditions even though the indicator lamp may be operating
normally. The following procedure also applies to circuits
with a voltmeter.
1. Insure that the undercharged condition has not been
caused by accessories having been left on for extended
periods.
Advertisement
Table of Contents
