ABS - Rear Wheel Speed Sensor Wiring Update

9224buick05

Bulletin: 91-8-23

Date: April, '91

Ref. No.: 91-149-8

Corp. Ref. No.: 118106


SUBJECT:
SERVICE MANUAL UPDATE - SECTION 8A ELECTRICAL DIAGNOSIS - PROPER ABS REAR WHEEL SPEED SENSOR WIRING

MODELS AFFECTED:
1991 REATTA MODELS


1991 Reattas built before VIN breakpoint 900577 are wired differently than is shown in the 1991 Riviera/Reatta Service Information Manual, page 8A-44-2. On these cars wiring for the right and left rear wheel speed sensors is reversed. Please mark the following changes for Reattas built before VIN breakpoint 900577 only:

^ Circuit 882 (brown) goes to EBCM pin 8
^ Circuit 883 (white) goes to EBCM pin 9
^ Circuit 884 (black) goes to EBCM pin 24
^ Circuit 885 (red) goes to EBCM pin 26