Convenience Center - Code 66 Chart & Wiring

9218oldsmobile03

NUMBER: 90-T-180

CORP.REF.NO: 016526

DATE: November 1990

SECTION: 6E3, 8A

SUBJECT:
SERVICE MANUAL UPDATE - CONVENIENCE CENTER
ID, DIAGNOSTIC GUIDELINES

MODELS/YEARS:
1990 CUTLASS SUPREME

A/C CLUTCH CONTROL AND COOLING FAN CONTROL SUPPLEMENTAL DIAGNOSTIC GUIDELINES

Some late production 1990 Cutlass Supreme models may be equipped with a new style convenience center that utilizes embossed terminal cavity numbers adjacent to each terminal cavity of the relay center (see Figure 1).

The old style unit does not utilize embossed numbers at the terminal cavities (see Figure 2). However, numbers were already assigned to the cavities in some of the diagnostic charts in the service manual. The numbers were changed for the "new style" convenience center to comply with certain standards.

The circuits contained within the "new style" convenience center are in the same physical locations as those of the "old style" unit.

Diagnostic charts used in DRIVEABILITY AND EMISSIONS (SECTIONS 6E2 and 6E3) and ELECTRICAL DIAGNOSIS (SECTION 8A) may require probing or jumpering of the numbered terminal cavities as part of the diagnostic process. This is particularly true in diagnosis of the A/C clutch control and cooliilg tan control circuits.

If the vehicle is equipped with the "new style" convenience center (Figure 1), use the attached supplemental 6E3 diagnostics that apply to the vehicle. If the vehicle is equipped with the "old style" convenience center (Figure 2), use the original 6E3 applicable service manual diagnostics.

The supplemental Service Manual pages are listed below:

YEAR CARLINE ENGINE VIN PAGES
1990 Cutlass 2.3 L A. D 6E3-A-4
Supreme 6E3-A-7
6E3-A-80
6E3-ClO-2
6E3-ClO-4
6E3-ClO-S
6E3-Cl2-2
6E3-Cl2-3

3.1 L T 6E3-A-5
6E3-ClO-4 6E3-Cl2-2 6E3-Cl2-4