Full Size Chevrolet V8-350 5.7L DSL (1984)
Charge Lamp/Indicator: Customer Interest
Battery - Excessive Drain At Idle
Number :
84-153
Section:
8C (XII)
Date :
June, 1984
Subject:
EXCESSIVE BATTERY DRAIN AT
IDLE ON 5.7L LF9 DIESEL ENGINES AND UD1 GAUGE OPTION
Model and Year:
1984 IMPALA/CAPRICE
TO:
ALL CHEVROLET DEALERS
A condition of excessive battery drain with the engine idling and accessory loads (lights, defog, etc.) on may be caused by a non-charging alternator.
Instrument Cluster/Oil and Check Engine Filter
A limited number of early 1984 model vehicles may have been built with an incorrect "oil and check engine" light filter installed in the cluster instead of
the correct "oil and battery" filter. These were only in vehicles equipped with the LF9 diesel engine and the UDI gauge option.
The bulb located in the "battery" cavity may have been removed in assembly. This bulb is part of the alternator field exciter circuit and its absence
results in a no alternator output condition at engine speeds of less than approximately 2700 RPM.
To correct a subject vehicle:
1.
Remove the instrument panel to gain access to the "check engine" light filter.
2.
Remove "oil and check engine" filter, P/N 25053790 and replace with an "oil and gen" light filter, P/N 25021489.
3.
Install a new lamp and socket assembly, P/N 25015169.
4.
Replace instrument panel.
