GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Headlight Diagnostic System Check?

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Go to Step 2

Go to Headlight System Check

2

  1. Disconnect the left headlamp relay K73 and the right headlamp relay K132.
  2. Use a DMM in order to measure the resistance between terminal 2 of the left headlamp relay K73 and terminal 8 of the right headlamp relay K132.

Is the measured resistance less than the specified value?

2 ohms

Go to Step 4

Go to Step 3

3

  1. Locate an open or a high resistance in CKT  M65
  2. Repair the open or the high resistance in CKT M65.

Did you complete the repair?

--

Go to Step 5

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4

Replace the left headlamp relay K73.

Did you complete the repair?

--

Go to Step 5

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5

  1. Connect all connectors and components previously disconnected.
  2. Verify that the DRL system operates properly.

Does the DRL system operate properly?

--

Go to Headlight System Check

Go to Step 1