ESM UPDATE - SEC. 8A ELECTRICAL DIAGNOSTIC REVISION

SUBJECT: ELECTRICAL SYSTEMS MANUAL UPDATE - ELECTRICAL DIAGNOSTIC REVISIONS

MODELS AFFECTED: 1993 PARK AVENUE/ULTRA AND LESABRE MODELS

This bulletin provides Late Production and Design Change Information ranging from wire gauge and color changes to changing connector pinout identification and wiring routing changes.

The following information reflects current changes and revisions to the Electrical Systems/Service Manual Diagnostic Procedure:

Please update your respective Electrical Systems Manual accordingly.

UPDATE CHANGE SUMMARY

CARLINE: BUICK LESABRE/PARK AVENUE/PARK AVENUE ULTRA ---------------------------------------------------- Page(s) Revision ------- -------- 260, 262 Add CKT 151 to "POSSIBLE CAUSES: - Open in CKT" list.

263 Add "CKT 151" to "T: MAIN RELAY GROUND TEST" in step [2].

240, 242, 260, 262 Add "See System Schematic, page 216" to CKT 803 at MAIN RELAY.

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.