GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Power Sunroof System Check?

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Go to Step 2

Go to Power Sunroof System Check

2

  1. Turn the ignition switch to the RUN position.
  2. Disconnect the folding top switch.
  3. Connect a fused jumper between the folding top switch connector terminal B CKT 1240 and the folding top switch connector terminal C CKT 124.

Does the folding top operate?

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Go to Ste  3

Go to Ste  4

3

Replace the folding top switch. Refer to Convertible Top Switch Replacement .

Did you complete the repair?

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Go to Power Sunroof System Check

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4

  1. Disconnect the folding top relay.
  2. Connect a test light between the folding top relay connector terminal A and ground.

Does the test light illuminate?

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Go to Step 5

Go to Step 6

5

Replace the folding top relay. Refer to Folding Top Relay.

Did you complete the repair?

--

Go to Power Sunroof System Check

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6

Measure the resistance in CKT 124 between the folding top switch connector terminal C and the folding top relay connector terminal A.

Is the resistance within the specified range?

0-2 ohms

Go to Step 8

Go to Step 7

7

Repair the open in CKT 124 between the folding top switch connector terminal C and the folding top relay connector terminal A. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Power Sunroof System Check

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8

Use the J 39200 DMM in order to measure the resistance in CKT 124 between the folding top switch connector terminal C and ground.

Is the resistance infinite?

Go to Power Sunroof System Check

Go to Step  9

9

Repair the short to ground in CKT 124 between the folding top switch connector terminal C and the folding top relay connector terminal A. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Power Sunroof System Check

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