Electrical Wiring Harness Design Changes. Saturn Saturn 1993

For 1990-2009 cars

# Electrical Wiring Harness Design Changes

Subject: | Service Information on Electrical Wiring Harness Design Changes

Models: | Some 1992 Saturns and all 1993 Saturn and Coupes

### Purpose

Three design changes havebeen made no 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 | 12064993 | 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 | Connector P/N | CPA P/N
--- | --- | ---
Rear Delog Switch | 12064758 | 12052834
HVAC Control | 12064752 | 12052834
HVAC Fan Switch | 12092374 | 12092376
HVAC Resister Block | 12064877 | 1202083
Master Window Switch | 12084795 12084796 | 12052834
Rear Window Switch | 12066571 12064749 | 12052834 12052834
HVAC I/P Junction Block | 12064749 12064752 | 12052834 12052834
Window Motor | 12064749 | 12052834

3. The ground didtribution 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 an 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