Saab SONETT III Service Manual page 54

Quick checking of alternator and charging regulator
If the charge indicator light does not go out, the first
thing to do is to check that the alternator belt is not slip-
ling and/or that the cable connections have not loosened.
If the lamp still glows after checking in this way, the
cause can be determined in the following manner:
Remove the connector from the charging regulator.
Con nect a cable between the red cable's terminal D +
and the yellow cable's terminal DF.
2973
TERMINALS DF AND D+ CONNECTED
Start the engine and let it run at max. 2.000 rev/min
while watching the charge indicator light.
WARN ING
Do not run the engine at a higher speed than 2.000
rev/min, as there is a risk of damage to the power
consu mer being caused by overvoltage.
If the indicator light goes out immediately, the charging
regulator is defective and must be renewed.
If the indicator light flashes or lights continuously, the
alternator must be overhauled.
Removal and installation of alternator
1. Disconnect the battery negative cable. Note that the
engine must be stopped before the cable is detached.
2. Remove the engine lid and the right valve casing.
3. Remove the windshield washer from its holder and
detach the throttle control spring from the control arm
shaft. Back off and remove the two retaining screws
holding the expansion tank. Lift the tank to one side
so that the hose is not in the way.
4. Disconnect the alternator cables. Back off and remove
the retaining and adjusting screws and remove the
alternator.
Removal and installation will be facilitated by slackening
the screw for the retaining bracket by the water pump.
The bracket can then be opened up.
Reinstall in the reverse sequence and then adjust the
alternator belt (fan belt) so that it can be pressed down
approx. 0.3 in. (7 mm) at a load of 15 N (3.5 Ib., 1.5 kp).
Refit the valve casing, using a new gasket.
REMOVAL OF ALTERNATOR
ADJUSTMENT OF FAN BELT TENSION
1. Adjusting screw
2. Retaining screw
Nov. 1972 SAAB
321-4