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Home >> Buick >> 1989 >> Reatta >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> 3.3L/3.8L PFI Tests W/Codes >> Diagnostic Trouble Code Charts: 13-66 >> Code 38: Brake Switch Circuit (3.3L) >> Notes

Code 38: Brake Switch Circuit (3.3L): Notes

Code 38 will set if no Code 24 is present, status at circuit No. 420 has not changed from high to low and vehicle speed has been greater than 35 MPH and back to zero MPH, 22 or more times.

NOTE: Test numbers refer to test numbers on diagnostic chart.
  1. Jumping the brake switch will determine if the ECM and wiring for the brake switch are okay.
  2. Verifies the voltage to the brake switch.
  3. Tests the brake switch for proper operation or misadjustment.
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