Chrysler RAM TRUCK 2500 1994 Service Manual page 331

8A - 18 ELECTRICAL
•
FIELD
TERMINALS
TO POWERTRAIN
CONTROL MODULE.
TERMINAL 51
- A 1 4 2 -
10 AMP FUSE
A i l
GROUND
^ ^ B A T T E R Y A
= = = CHASSIS "
+ GROUND
J948A-17
Fig. 1 Generator Output Wire Resistance Test (Typical)
(2) Adjust engine speed and carbon pile to main­
tain 20 amperes flowing i n circuit. Observe voltmeter
reading. Voltmeter reading should not exceed 0.5
volts.
RESULTS
I f a higher voltage drop is indicated, inspect, clean
and tighten all connections between generator bat­
tery terminal and battery positive post. A voltage
drop test may be performed at each connection to lo­
cate connection with excessive resistance. I f resis­
tance tested satisfactorily, reduce engine speed, turn
OFF carbon pile and turn OFF ignition switch.
(1) Disconnect negative cable from battery.
(2) Remove test ammeter, voltmeter, carbon pile,
and tachometer.
(3) Remove jumper wire.
(4) Connect generator output wire to generator
battery terminal post. Tighten to 5 to 6 N*m (45 to 75
in. lbs.).
(5) Connect negative cable to battery.
(6) Use DRB scan tool to erase DTC.
GENERATOR OUTPUT TEST
Generator output test determines whether genera­
tor can deliver its rated current output.
PREPARATION
(1) Before starting any tests, make sure vehicle
has a fully charged battery. Test and procedures on
how to check for a fully charged battery are shown i n
Battery Test Procedures.
(2) Disconnect negative cable from battery.
(3) Disconnect generator output wire at the gener­
ator battery terminal.
(4) Connect a 0-150 ampere scale D.C. ammeter i n
series between generator battery terminal and dis­
connected generator output wire (Fig. 2). Connect
positive lead to generator battery terminal and neg­
ative lead to disconnected generator output wire.
(5) Connect positive lead of a test voltmeter (range
0-18 volts minimum) to generator battery terminal.
(6) Connect negative lead of test voltmeter to a
good ground.
(7) Connect an engine tachometer and connect bat­
tery negative cable.
(8) Connect a variable carbon pile rheostat be­
tween battery terminals. Be sure carbon pile is i n
OPEN or OFF position before connecting leads. See
Load Testing i n Battery Test Procedures for instruc­
tions.
(9) Connect one end of a jumper wire to ground
and with other end probe K20 lead wire at back of
generator (Fig. 2). This will generate a DTC.