G424 Service Manual Adjustment and Troubleshooting173
Engine Starting Problems (Continued)
Symptom Cause
1. No spark. A. Distributor cap or spark plug leads arcing.
B. Spark plugs fouled, burned or cracked porcelain.
C. Spark plug wires are broken or have faulty insulation.
D. Battery, electrical connections, damaged wiring.
E. Ignition switch.
F. Faulty ignition components.
G. Cracked or dirty distributor cap.
H. Shorted tachometer. (Disconnect tachometer and try again).
2. Engine will not crank over. A. Battery charge low, damaged wiring or loose electrical connections.
B. Circuit breaker tripped (if equipped).
C. Bad ignition switch.
D. Bad starter solenoid.
E. Defective starter motor.
Charging System Problems
Symptom Cause
1. Gauges indicate no A. Loose or broken drive belt.
battery charge. B. Loose or corroded electrical connections.
C. Faulty ammeter or voltmeter.
D. Battery will not accept charge.
E. Faulty alternator or regulator.
2. Noisy alternator. A. Loose mounting bolts.
B. Worn, frayed or loose drive belt.
C. Loose drive pulley.
D. Worn or dirty bearings.
E. Faulty diode trio or stator.
Instrument Problems
Symptom Cause
1. Malfunctioning A. Faulty wiring, loose or corroded terminals.
instruments or gauges. B. Bad key switch.
C. Faulty gauge.
D. Faulty sender.
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