GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Turn the ignition switch to the RUN position.
  2. Disconnect the engine coolant level switch.
  3. Connect a fused jumper wire from the engine coolant level switch connector, cavity A, to ground.

Refer to Using Fused Jumper Wires in Wiring Systems.

Did the low engine coolant light illuminate?

--

Go to Step 7

Go to Step 2

2

Connect a test light from the instrument cluster connector, cavity 22, to ground.

Did the test light illuminate?

--

Go to Step 4

Go to Step 3

3

Repair the open in CKT 39 (PNK) between the GAUGES fuse and the instrument cluster connector.

Is the repair complete?

--

System OK

--

4

Using a fused jumper wire, backprobe the instrument cluster connector, cavity 25, to ground.

Refer to Using Connector Test Adapters in Wiring Systems.

Did the low engine coolant light illuminate?

--

Go to Step 5

Go to Step 6

5

Repair the open in CKT 68 (YEL/BLK) between the instrument cluster connector and the engine coolant level switch connector.

Is the repair complete?

--

System OK

--

6

Replace the instrument cluster.

Is the repair complete?

--

System OK

--

7

Connect a test light from the engine coolant level switch connector, cavity B, to B +.

Did the test light illuminate?

--

Go to Step 8

Go to Step 9

8

Replace the engine coolant level switch.

Is the repair complete?

--

System OK

--

9

Repair the open in CKT 250 (BLK) between the engine coolant level switch connector and G 200.

Is the repair complete?

--

System OK

--