GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 1999 🢒 Grand Prix 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Backup Lamps Always On

Step

Action

Value(s)

Yes

No

1
  1. Shift the transaxle to the PARK position.
  2. Turn the ignition switch to the RUN position.
  3. Disconnect the PARK/NEUTRAL position switch connector C1.

Did the backup lamps light?

--

Go to Step 3

Go to Step 2

2

Adjust/Replace the PARK/NEUTRAL switch. Refer to Park/Neutral Position Switch Adjustment in automatic transaxle -- 4T65-E or Park/Neutral Position Switch Adjustment in automatic transaxle -- 4T60-E.

Has the repair been made?

--

Go to Backup Lamp System Check

--

3

Repair a short to B+ on circuit 24.

Has the repair been made?

--

Go to Backup Lamp System Check

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