Faulty Indicators (SVS, Cruise), Erratic Fuel Gauge (Remove Moisture from C101)
| Subject: | Faulty Indicators (SVS, Cruise, ABS, Low Tire On; A/C, TCC or Cruise Inoperative), Erratic Fuel Gauge or Vehicle Speed Display (Remove Moisture Contamination from C101) |
| Models: | 1999 Buick Century, Regal |
Condition
Some customers may comment on one or more of the following symptoms occurring with the vehicle:
| • | The Service Vehicle Soon indicator is illuminated with vehicle running. However, it does not come ON at bulb check (circuit 419, pin V of connector 101). |
| • | The cruise control (#1) functions are intermittent or inoperative (circuit 17 pin E, circuit 83 pin F, circuit 85 pin A, circuit 817 pin G of connector 101). |
| • | The ABS warning lamp (amber) is illuminated. DTC's C1223, C1224, C1227, C1228, C1234, C1235 or C1245 (circuit 884 pin L, circuit 885 pin M, circuit 882 pin N, circuit 883 pin P of connector 101). |
| • | The torque converter clutch is inoperative (circuit 420 pin C of connector 101). |
| • | Fuel economy is not what it should be, due to lack of TCC (circuit 420 pin C of connector 101). |
| • | The cruise control light on the dash is on all the time, or does not work (circuit 85 pin A of connector 101). |
| • | Low tire indicator is showing intermittently (circuit 884 pin L, circuit 885 pin M, circuit 882 pin N, circuit 883 pin P of connector 101). |
| • | Fuel gauge is erratic, intermittent, fluctuates, always reads full or always reads empty (circuit 452 pin H, circuit 590 pin J, circuit 474 pin J circuit 1569 pin W of connector 101). |
| • | The Service Vehicle Soon Lamp is ON with stored DTC's P0440, P0442, P0446, P0452, P0453 (circuit 890 pin J, circuit 474 pin K of connector 101). |
| • | Air conditioning is inoperative (circuit 782 pin U, circuit 474 pin K of connector 101). |
| • | Vehicle speed display on the instrument panel is erratic, zero or shows maximum gauge reading (circuit 817 pin G of connector 101). |
| • | The Tech 2 fails to communicate with the vehicle DTC's U1016, U1040, U1096 or U1300 (circuit 1049 Pin R, circuit 1122 pin S of connector 101). |
These symptoms may be intermittent and may be a single or a combination of conditions.
Cause
If normal diagnosis does not lead to a repair of the vehicle, the root cause of the condition may be moisture contamination of connector C101(#2).
The moisture may cause an open, short to ground or short to voltage, causing one or many different symptoms.
Correction
- Remove nut holding connector 101 to the front of the left front shock tower. Discard the nut. Open connector C101. Remove the metal bracket from the female portion of connector 101.
- Spray clean the terminals within each connector with D.P.L. Moisture Displacing Lubricant, U.S. P/N 1052864, Canadian P/N 10952982. Blow dry the connectors with compressed shop air, while observing all safety procedures which include using safety glasses.
- Seal the connector (both the terminal end and the wire end of each connector) with a small amount of Dielectric Lubricant, U.S. P/N 12345579 or 12377900, Canadian P/N 01974984 or 10953529. This is a water sealing lubricant, which will help keep water from getting to the terminals and causing the changes in the resistance values. Care must be used to ensure that the lubricant, the applicator and the connection remain absolutely clean.
- Install a new plastic retainer (P/N 12084149) to connector 101 in the appropriate sized slot in the connector, 90 degrees from where the metal retainer was removed.
- Reroute the lower connector and wiring in front of the A/C lines. Reconnect the connector and insert the rosebud of the clip in the hole in the shock tower to radiator support brace from the underside.
Parts Information
Part Number | Description |
|---|---|
12084149 | Retainer, Electrical wiring |
U.S. 1052864 Canadian 10952982 | D.P.L. Moisture Displacing Lubricant |
U.S. 12345579 Canadian 01974984 | Dielectric Silicone Grease, 1 oz tube |
U.S. 12377900 Canadian 10953529 | Dielectric Lubricant, 2 oz tube |
Part are currently available from GMSPO.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation | Description | Labor Time |
|---|---|---|
N8500 | Connector, Wiring Clean | 0.2 hr |
