GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 1998 🢒 Grand Prix 🢒 Restraints 🢒 SIR 🢒 PRNDL Display Inaccurate or Inoperative

Step

Action

Value(s)

Yes

No

1

Are any of the shift select indicators lighting properly?

--

Go to Step 2

Go to Step 29

2

Do only some of the shift select light properly?

--

Go to Step 9

Go to Step 3

3

Do the shift select indicators change intensity when the headlamp switch is in the PARK position?

--

Go to Step 4

Go to Step 5

4

Do the shift select indicators work properly?

--

System OK

--

5
  1. Disconnect the instrument cluster harness connector C2.
  2. Turn the ignition switch to the RUN position.
  3. Ensure that the headlamp switch is in the OFF position.
  4. Use a DMM in order to measure the voltage between the instrument cluster connector C2 terminal E and ground.

Is the measured voltage within the specified value?

0 Volts

Go to Step 6

Go to Step 8

6
  1. Disconnect the instrument cluster harness connector C2.
  2. Turn the ignition switch to the RUN position.
  3. Ensure that the headlamp switch is in the PARK position.
  4. Use a DMM in order to measure the voltage between the instrument cluster connector C2 terminal E and ground.

Is the measured voltage within the specified value?

9-14 Volts

Go to Step 20

Go to Step 7

7
  1. Repair the poor connection or the open in CKT 308 between the instrument cluster harness connector C2 terminal E and S212.
  2. Inspect the system.

Is the repair complete?

--

System OK

--

8
  1. Repair the short to voltage in CKT 308.
  2. Inspect the system.

Is the repair complete?

--

System OK

--

9
  1. Ensure that the shift selector is in the PARK position.
  2. Disconnect the transaxle range switch connector C2.
  3. Turn the ignition switch to the OFF position.
  4. Connect a fused 3 amp jumper between the transaxle range switch harness connector C2 terminal A and ground.
  5. Connect a fused 3 amp jumper between the transaxle range switch harness connector C2 terminal D and ground.

Does the PARK indicator light?

--

Go to Step 10

Go to Step 12

10
  1. Ensure that the shift selector is in the PARK position.
  2. Ensure that the transaxle range switch connector C2 is disconnected.
  3. Turn the ignition switch to the OFF position.
  4. Connect a fused 3 amp jumper between the transaxle range switch harness connector C2 terminal C and ground.

Does the DRIVE indicator light?

--

Go to Step 11

Go to Step 21

11
  1. Adjust the transaxle range switch. Refer to Park/Neutral Position Switch Adjustment in Automatic Transaxle - 4T60-E or Park/Neutral Position Switch Adjustment in Automatic Transaxle - 4T65-E.
  2. Inspect the system.

Is the repair complete?

--

System OK

--

12
  1. Ensure that the shift selector is in the PARK position.
  2. Ensure that the transaxle range switch connector C2 is disconnected.
  3. Turn the ignition switch to the LOCK position.
  4. Disconnect the instrument cluster harness connector C2.
  5. Inspect CKT 776 between the instrument cluster harness connector C2 terminal B and the transaxle range switch harness connector C2 terminal A.

Is CKT 776 open?

--

Go to Step 13

Go to Step 14

13
  1. Repair the poor connection or the open in CKT 776 between the instrument cluster harness connector C2 terminal B and the transaxle range switch harness connector C2 and terminal A.
  2. Inspect the system.

Is the repair complete?

--

System OK

--

14
  1. Ensure that the shift selector is in PARK position.
  2. Ensure that the transaxle range switch connector C2 is disconnected.
  3. Turn the ignition switch to the LOCK position.
  4. Ensure that the instrument cluster harness connector C2 is disconnected.
  5. Inspect for a poor connection or an open in CKT 771 between the instrument cluster harness connector C2 terminal C and the transaxle range switch harness connector C2 terminal D.

Does a poor connection or an open exist in CKT 771 between the instrument cluster harness connector C2 terminal C and the transaxle range switch harness connector C2 terminal D?

--

Go to Step 15

Go to Step 16

15
  1. Repair the poor connection or the open in CKT 771 between the instrument cluster harness connector C2 terminal C and the transaxle range switch harness connector C2 terminal D.
  2. Inspect the system.

Is the repair complete?

--

System OK

--

16
  1. Ensure that the shift selector is in the PARK position.
  2. Ensure that the transaxle is disconnected.
  3. Turn the ignition switch to the LOCK position.
  4. Ensure that the instrument cluster harness connector C2 is disconnected.
  5. Inspect for a short to ground in CKT 772.

Does a short to ground exist in CKT 772?

--

Go to Step 17

Go to Step 18

17
  1. Repair the short to ground in CKT 772.
  2. Inspect the system.

Is the repair complete?

--

System OK

--

18
  1. Ensure that the shift selector is in the PARK position.
  2. Ensure that the transaxle is disconnected.
  3. Turn the ignition switch to the LOCK position.
  4. Ensure that the instrument cluster harness connector C2 is disconnected.
  5. Inspect for a short to ground in CKT 773.

Does a short to ground exist in CKT 773?

--

Go to Step 19

Go to Step 20

19
  1. Repair the short to ground in CKT 773.
  2. Inspect the system.

Is the repair complete?

--

System OK

--

20
  1. Replace the instrument cluster. Refer to Instrument Cluster Replacement .
  2. Inspect the system.

Is the repair complete?

--

System OK

--

21
  1. Ensure that the shift selector is in the DRIVE position.
  2. Ensure that the transaxle range switch connector C2 is disconnected.
  3. Turn the ignition switch to the LOCK position.
  4. Disconnect the instrument cluster harness connector C2.
  5. Inspect for a poor connection or an open in CKT 772 between the instrument cluster harness connector C2 terminal A and the transaxle range switch harness connector C2 terminal B.

Does a poor connection or an open exist in CKT 772 between the instrument cluster harness connector C2 terminal A and the transaxle range switch harness connector C2 terminal B?

--

Go to Step 22

Go to Step 23

22
  1. Repair the poor connection or the open in CKT 772 between the instrument cluster harness connector C2 terminal A and the transaxle range switch harness connector C2 terminal B.
  2. Inspect the system.

Is the repair complete?

--

System OK

--

23
  1. Ensure that the shift selector is in the DRIVE position.
  2. Ensure that the transaxle range switch connector C2 is disconnected.
  3. Turn the ignition switch to the LOCK position.
  4. Disconnect the instrument cluster harness connector C2.
  5. Inspect for a poor connection or an open in CKT 773 between the instrument cluster harness connector C2 terminal R and the transaxle range switch harness connector C2 terminal C.

Does a poor connection or an open exist in CKT 773 between the instrument cluster harness connector C2 terminal A and the transaxle range switch harness connector C2 terminal B?

--

Go to Step 24

Go to Step 25

24
  1. Repair the poor connection or the open in CKT 773 between the instrument cluster harness connector C2 terminal R and the transaxle range switch harness connector C2 terminal C.
  2. Inspect the system.

Is the repair complete?

--

System OK

--

25
  1. Ensure that the shift selector is in the DRIVE position.
  2. Ensure that the transaxle range switch connector C2 is disconnected.
  3. Turn the ignition switch to the LOCK position.
  4. Ensure that the instrument cluster harness connector C2 is disconnected.
  5. Inspect for a short to ground in CKT 771.

Does a short to ground exist in CKT 771?

--

Go to Step 26

Go to Step 27

26
  1. Repair the short to ground in CKT 771.
  2. Inspect the system.

Is the repair complete?

--

System OK

--

27
  1. Ensure that the shift selector is in the DRIVE position.
  2. Ensure that the transaxle range switch connector C2 is disconnected.
  3. Turn the ignition switch to the LOCK position.
  4. Ensure that the instrument cluster harness connector C2 is disconnected.
  5. Inspect for a short to ground in CKT 776.

Does a short to ground exist in CKT 776?

--

Go to Step 28

Go to Step 20

28
  1. Repair the short to ground in CKT 776.
  2. Inspect the system.

Is the repair complete?

--

System OK

--

29

Inspect the BTSI fuse in the fuse block for an open.

Does an open exist in the BTSI fuse?

--

Go to Step 30

Go to Step 31

30
  1. Repair the short to ground in CKT 1020.
  2. Inspect the system.

Is the repair complete?

--

System OK

--

31
  1. Disconnect the instrument cluster connector C2.
  2. Turn the ignition switch to the RUN position.
  3. Use a DMM in order to measure the voltage between the instrument cluster harness connector C2 terminal D and ground.

Is the measured voltage within the specified value?

B+

Go to Step 33

Go to Step 32

32
  1. Repair the poor connection or the open in CKT 1020 between the fuse block terminal C2 and the instrument cluster harness connector C2 terminal D.
  2. Inspect the system.

Is the repair complete?

--

System OK

--

33
  1. Ensure that the shift select lever is in the PARK position.
  2. Disconnect the transaxle range switch connector C2.
  3. Us a DMM in order to measure the voltage between the transaxle range switch harness connector C2 terminal A and B+.

Is the measured voltage within the specified value?

--

Go to Step 20

Go to Step 34

34
  1. Inspect for a poor connection or an open in CKT 1050 between the transaxle range switch harness connector C1 terminal D and G117.
  2. If OK, replace the transaxle range switch. Refer to Park/Neutral Position Switch Replacement in Automatic Transaxle - 4T60-E or Park/Neutral Position Switch Replacement in Automatic Transaxle - 4T65-E.
  3. Inspect the system.

Is the repair complete?

--

System OK

--