ENGINE-continued - TM-5-4320-273-140050

TM 5-4320-273-14

Table 4-2. Troubleshooting -- Continued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

ENGINE -- Continued

Visually inspect for loose or corroded terminals or broken battery cables.

Step 2.

Clean the battery posts and cable ends with a solution of water and baking soda. Replace cables (3 and 4, fig.

4-1) if damaged. After installation apply light coat of GM lubricant to battery posts and terminals to

prevent corrosion.

Check for faulty starter switch or damaged wiring.

Step 3.

Use an ohmmeter or test lamp to check continuity of switch. Continuity should not exist when the switch is

in the RUN position, but it should exist when switch is depressed.

CAUTION

Disconnect the battery cable from the positive battery terminal before discon-

necting any other electrical leads from the engine components. This will

prevent shorts which could damage the alternator, voltage regulator and other

parts.

To replace bad starter switch, tag and disconnect the electrical wires from switch.

Remove nuts, lockwashers, and machine screws which secure switch to instrument panel. Remove bad

switch.

Install serviceable starter switch through instrument panel and secure with machine screws, lockwashers,

and nuts.

Replace defective wiring if insulation is damaged or wire is broken by removing nuts and lockwashers from

each end. Remove bad wire.

Install serviceable wire and secure by replacing lockwashers and nuts to each end.

Check for defective starting motor.

Step 4.

CAUTION

Disconnect the battery cable from the positive battery terminal before discon-

necting any other electrical leads from the engine components. This will

prevent shorts which could damage the alternator, voltage regulator, and

other parts.

Disconnect electrical cable (2, fig. 4-2) from starting motor by removing nut (1).

4-6