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'98 Buick Regal - Right turn signals and brake lights
Sent to Car Experts April 01 03:03 PM

'98 Buick Regal - Right turn signals and brake lights work normally. Left turn signal blinks rapidly in front, not at all in the back. Left brake light works normally when turn signal is off, but not at all when turn signal is on. Bulb has been replaced even though it was still good. Disconected wiring at the first connector upstream from the rear lights and tested there -- same result as the lights. Where do I look next???

Customer (name blocked for privacy)
Status:  Closed   Value: $15
Answer
April 1 3:20 PM (16 minutes and 37 seconds later)
         
REPLIEDCheck Mark
Check all of nthe fuses under the hood.If they are ok You will most likely need a DRL module.It controls the change from turn signal to DRL function.Here are

Daytime Running Lights (DRL) Control Module Replacement

Removal Procedure

    Images available only to Customers.


    Images available only to Customers.


  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  2. Remove the LH instrument panel insulator. Refer to Insulator Replacement - Instrument Panel (I/P) in Instrument Panel, Gauges and Console.
  3. Grasp the daytime running lamp (DRL) module and slide it upward to release the module tabs from the retaining slots on the BCM bracket; reposition the module.
  4. Disconnect the electrical connectors from the DRL control module and remove the module.
Installation Procedure

    Images available only to Customers.


    Images available only to Customers.


  1. Connect the electrical connectors to the DRL control module.
  2. Position the DRL control module to the BCM bracket, then slide the module downward to secure the module tabs into the retaining slots on the bracket.
  3. Install the LH instrument panel insulator. Refer to Insulator Replacement - Instrument Panel (I/P) in Instrument Panel, Gauges and Console.
  4. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
instuctions to replace it.

Master ASE Certified.L1 Advanced Engine Performance Certified.Pa Emission Repair Technician.Just Answer Car Category Mentor.
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Davo -- Master technician -- 99% Positive Feedback on 1931 Car Accepts
ASE Master Technician/Advanced Automotive Diagnostic Technician
Reply
April 1 4:13 PM (53 minutes and 38 seconds later)
         
Reply to Davo/diablo666's Post: I tested all fuses in two locations (right side of dash and under hood) with a continuity tester. I forgot to tell you that this began as an intermittent problem and is now permanent. Does that change anything?

Does the DRL module really control the turn/brake lights? There are no bulbs in common between the two systems. Where would I find a DRL module? Dealer only?
Customer (name blocked for privacy)
Answer
April 1 4:17 PM (4 minutes and 6 seconds later)
         
ACCEPTEDCheck Mark
Sorry I misread your question I thought the front turn signal was the problem not the rear.You probably have a bad turn signal switch then.

Master ASE Certified.L1 Advanced Engine Performance Certified.Pa Emission Repair Technician.Just Answer Car Category Mentor.
Picture
Davo -- Master technician -- 99% Positive Feedback on 1931 Car Accepts
ASE Master Technician/Advanced Automotive Diagnostic Technician
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