Brakes - Adding Wire Colors to ABS Wheel Speed Sensor

9224buick06

Bulletin 92-8-1

Date May '91

Ref. No. 92-002-8

Corp. Ref. No. 118108


SUBJECT:
SERVICE MANUAL UPDATE - SECTIONS 8A, 5E1 - ADDING WIRE COLORS TO ABS WHEEL SPEED SENSOR ASSEMBLIES

MODELS AFFECTED:
1991 ROADMASTER WAGONS 1992 ROADMASTER SEDANS


This bulletin serves to update ELECTRICAL DIAGNOSIS (SECTION 8A) and ANTILOCK BRAKE SYSTEM DIAGNOSIS (SECTION 5E1) of the 1991 Roadmaster Service Manual.

Some 1991 Roadmaster Wagons and early 1992 Roadmaster Sedans have been built with wire colors that differ from those specified in the 1991 Roadmaster Service Manual and 1992 Roadmaster Preliminary Service Manual. The wires in question are part of the ABS wheel speed sensor circuits. These wires are covered with a protective jacket over the length of the wheel speed sensor harness and are only viewable at the terminating connectors. For the left front and rear axle speed sensors the terminating connector is the EBCM harness connector. For right front speed sensor the wires terminate at the forward lamp harness connector C106. The possible combinations are as follows:

Possibilities:
LH FRONT WHEEL SPEED SENSOR 830 YEL (EBCM Terminal "6") and 873 YEL (EBCM Terminal "4") 830 BLU (EBCM Terminal "6") and 873 BRN (EBCM Terminal "4") 830 BRN (EBCM Terminal "6") and 873 BLU (EBCM Terminal "4")

REAR AXLE WHEEL SPEED SENSOR 882 WHT (EBCM Terminal "7") and 883 WHT (EBCM Terminal "g") 882 BRN/RED (EBCM Terminal "7") and 883 BLU/RED (EBCM Terminal "9") 882 BLU/RED (EBCM Terminal "7") and 883 BRN/RED (EBCM Terminal "9")

RH FRONT WHEEL SPEED SENSOR 872 RED (ClO6 Terminal "B") and 833 RED (ClO6 Terminal "A") 872 WHT (ClO6 Terminal "B") and 833 WHT (ClO6 Terminal "A")

Please update the 1991 Service Manual and 1992 Preliminary Service Manual art on the pages indicated (attached). Also, please note that the forward lamp harness connector C106, part of the right front wheel speed sensor circuit, is a 2-way connector, not a 3-way connector as specified on page 8A-44-3 of both manuals.











ABS Wiring Diagram