For 1990-2009 cars

# ENG. SERVICE MANUAL UPDATE ABS-REV. MAIN RELAY POWER TEST

#### SUBJECT: ANTILOCK BRAKE SYSTEM REVISED MAIN RELAY POWER TEST

#### VEHICLES AFFECTED: 1993 "C" AND "H" MODELS

The information given in TEST A: MAIN RELAY POWER TEST, found in the Electrical Systems Manual contains an error that could lead to confusion and misdiagnosis of the ABS system.

The following revised chart should be used for proper ABS system diagnosis:

1993 LeSabre, Park Avenue/Park Avenue Ultra, page 241

Please update your respective Electrical Systems Manual accordingly.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.