SER. INFO. ON ELECT. WIRING HARNESS DESIGN CHANGES. Saturn Saturn 1993

For 1990-2009 cars

# SER. INFO. ON ELECT. WIRING HARNESS DESIGN CHANGES

#### SUBJECT: Service Information on Electrical Wiring Harness Design Changes

#### MODELS AFFECTED: Some 1992 Saturns and all 1993 Saturn Sedans and Coupes

PURPOSE: Three design changes have been made to electrical wiring harnesses as follows:

1. The connector position assurance (CPA) retainers have been eliminated from the following connectors in interim model year 1992 and all 1993 models.

Connector Description Connector P/N CPA P/N --------------------- ------------- ------- Rear Radio Speakers 12077887 12052834 (Connector Kit 12116746)

Cargo Lamp 12052832 12052834

Clutch Cruise Switch 12052832 12052834

HVAC Blower Motor 12064829 12020833

HVAC Recirc. Switch 12064993 12064989

Door Lock Switch 12064758 12052834

Oxygen Sensor 12089916 12052834

A/C Compressor Switch 12065172 12052834

2. The connector position assurance (CPA) retainers have been eliminated from the following connectors shortly after start of model year 1993 production.

Connector Description Connector P/N CPA P/N --------------------- ------------- -------

Rear Defog Switch 12064758 12052834

HVAC Control 12064752 12052834

HVAC Fan Switch 12092374 12092376

HVAC Resister Block 12064877 12020833

Master Window Switch 12084795 12052834 12084796 12052834

Rear Window Switch 12066571 12052834 12064749 12052834

HVAC I/P Junction 12064749 12052834 Block 12064752 12052834

Window Motor 12064749 12052834

3. The ground distribution system has changed for the rear body splice pack. The rear body splice packs on vehicles built BEFORE the change are connected to body ground at a weld stud in the left rear wheel well area (refer to Figure). Wiring diagrams for this configuration can be found in the "1991-1992 Electrical Power Distribution Service Manual."

Rear body splice packs on vehicles built AFTER this change are connected to body ground at the rear package shelf (refer to Figure). Wiring diagrams for this configuration can be found in the "Electrical Distribution" section of the "1993 New Model Product Guide." This change was implemented on some 1992 models starting with and including VIN NZ156919. This change was fully implemented on all models starting with and including VIN NZ182094. The following systems utilize the rear body splice pack for ground:

* Fuel Pump * Left Rear Stop/Tail Lamp * Center High Mounted Stop Lamp * Cargo Lamp * License Lamp

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.