Charging System Diagnosis - Pontiac TRANS AM 1977 Service Manual

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INDICATOR LAMP OPERATION
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-1
Engine Stopped Ion. Switch
TEST NO. 3
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Zero Voltage
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Lamp Off Lamp Off
NORMAL NORMAL Lamp On
Sr Test 2
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I f the indicator lamp operation
is normal for all t h r n tats.
Repair open cirsuit i n No: 1 wire
Connect voltmeter t o BAT.
termiml on generator and
chassis ground. Turn
ignition key on.
starter t o partially discharp.
it
before
recording maximum current w t p u t .
Output within 10 a m p of rated out-
put stamped on generator frame.
NORMAL
Check 10 amp.
"GAUGES"
"TRANS." fuse
i n fuse block.
2. Dinconmet wires from BAT.
termiml on generator.
Chldc drive bdt and
refer t o SI generator Diagnosis
wiring connections at
Delmtron and battery cables.
Disconnect No. 1 and 2 Connector
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Disconnect No. 1 and 2
at generator, Ground No. 1 wire. Do Connector at generator.
I NOT gmund No. 2 wire.
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3. Connect ammeter black lead t o
BAT. terminel wirer and red
lead t o BAT. termiml.
k n e w V o w
4. Connect httw ground strap.
5. Turn o n all accessories, li*U o n
high beam, a+ blower on hi* speed.
Zero Voltage
6 . Run engine as required t o obtain
maximum current output and record
ammeter reading..
Check 10 amp.
Output NOT within 10 ampa of rated
Check battery connections and
hnm
output stampad on generator frame.
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Lamp Off Lamp On
Output within 10 amps of rated out-
"GAUGES"
"TRANS." fuse
i n fuse block.
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Inran scr.rrdriver into t a t hols.
End of scr.rrdrivsr must touch tab and side
of screwdriver ground against end frame.
D i o n n a c t No. 1 and No. 2 C o n m t o r
at generator. Connect voltmetmr from
No. 1 connutor t o chassis ground.
2. Open i n No. 1 wire from
gemrator to ignitionswitch.
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R-ir open circuit b e t w n n
BAT. tarmiml on Delcotron
and junction block or
1. Connect No. 1 and No. 2
connector t o generator.
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Repair short between
Replace Rectifier
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No. 1 and No. 2 Bridge i n generator.
1. Lamp burned out. wiresin harness.
2. Inran screwdriver into
test hole t o gmund rotor
connector
is
m a k i w
Replace Regulator
good contact on terminal.
2. D i e m b l e generator
and check brurha, slip
r i m and rotor winding
for open.
Remove generator. Refer t o
Replace Regulator
Output NOT within 10 amps of rated
Generator Dirasrsmbly.
output stamped o n generator frame.