Celebrity L4-151 2.5L (1982)
Radiator Cooling Fan Motor Relay: All Technical Service Bulletins
Engine - Low Engine Idle Speed/Rough Idle
Number:
83-T-56
Section:
Ia
Date:
June, 1983
Subject:
A/C COMPRESSOR LOADING IN DEFROST MODE ON FOUR CYLINDER ENGINES - 1982-83 CELEBRITYS, CITATIONS
AND CAVALIERS
A/C CIRCUIT
TO:
ALL CHEVROLET DEALERS
Low engine idle speed and rough idle can be caused by high A/C compressor 8 Cloads due to high head pressures resulting from
compressor operation without engine cooling fan operation while in defrost mode.
This condition can be corrected by installing an additional engine cooling fan relay (see diagram) to operate the engine cooling fan in
defrost mode.
The relay should be installed on the cowl, adjacent to the pressure cycling switch. Any wiring run through the cowl should be routed
through existing grommets and care be taken to maintain cowl sealing.
MATERIALS REQUIRED
Quantity
P/N
Description
1
14047112
Cooling Fan Relay
1
NPN
Connector Body
4
NPN
Connector Terminals
WARRANTY INFORMATION
