A/C - No Blower Speed Change Low to Medium
90chevy29Number: 90-287-8A
Section: 8A
Date: July 1990
Corp. Bulletin No.: 078106R
Subject: NO BLOWER SPEED CHANGE LOW TO MEDIUM
Model and Year: 1990 CAVALIER WITH C/41 STANDARD HEATER
TO: ALL CHEVROLET DEALERS
There have been some customer comments of no medium blower speed on standard heater (C-41) equipped vehicles. The blower functions normally on high speed but there is no apparent difference in air flow between low and medium speed.
CAUSE:
The 51 circuit and the 52 circuit wires at the blower motor resistor, cavities D and B, are reversed.
CORRECTION:
Refer to Cavalier Service Manual, Page 8A-60-0 for proper wiring procedure.
WARRANTY INFORMATION:
Labor Operation Number: N6310
Labor Time: 0.5 Hour
Trouble Code: 92