2001 Pontiac Firebird Headlights.

Tiny
DREW51
  • MEMBER
  • 2001 PONTIAC FIREBIRD
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 87,000 MILES
I have seen the 1st part of this in a previous question. When I turn off headlights the motors continue to run for 5 or 6 second. In addition, when I turn on just the parking lights, the headlights pop open. Also, when I lock or unlock my doors the headlights pop open and then shut. Each time they close the motors continue to run.
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Thursday, August 26th, 2010 AT 6:20 AM

9 Replies

Tiny
KHLOW2008
  • EXPERT
Hi drew51,

Thank you for the donation.

Problem seems to be a Body Control Module fault. Perform the following to see if any trouble codes are present.

LIGHTING SYSTEMS DIAGNOSTIC SYSTEM CHECK
Retrieve and display DTCs by entering Body Control Module (BCM) using SECURITY indicator diagnostic mode. See RETRIEVING BODY CONTROL MODULE DIAGNOSTIC TROUBLE CODES. If diagnostic mode is entered and DTCs are retrieved, go to next step. If diagnostic mode cannot be entered, perform TEST C: CANNOT ENTER BODY CONTROL MODULE DIAGNOSTICS under SYSTEM TESTS in BODY CONTROL MODULES - CAMARO & FIREBIRD article.

2. If both DTCs 12 and 55 are retrieved, go to next step. If either DTCs 12 and 55 are not retrieved, perform TEST C: CANNOT ENTER BODY CONTROL MODULE DIAGNOSTICS under SYSTEM TESTS in BODY CONTROL MODULES - CAMARO & FIREBIRD article.

3. If DTCs 21/31 or DTCs 22/32 are not retrieved, go to next step. If DTCs 21/31 or DTCs 22/32 are retrieved, perform appropriate test in accordance with DTC retrieved. See DIAGNOSTIC TROUBLE CODE DEFINITIONS in BODY CONTROL MODULES - CAMARO & FIREBIRD article.

4. If any other DTCs are retrieved, perform appropriate test in accordance with DTC retrieved. See DIAGNOSTIC TROUBLE CODE DEFINITIONS in BODY CONTROL MODULES - CAMARO & FIREBIRD article. If other DTCs are not retrieved, repair courtesy lights as necessary. See ILLUMINATION/INTERIOR LIGHTS article.

RETRIEVING BODY CONTROL MODULE DIAGNOSTIC TROUBLE CODES
CAUTION:If vehicle is equipped with THEFTLOCK(R) (radio anti-theft feature), obtain secret code from customer. Disable THEFTLOCK(R) prior to disconnecting power to vehicle or removing RADIO fuse. See RADIO ANTI-THEFT FEATURE (THEFTLOCK(R)) DISABLING under PROGRAMMING. Enable THEFTLOCK(R) after restoring power to vehicle or reinstalling RADIO fuse. See RADIO ANTI-THEFT FEATURE (THEFTLOCK(R)) UNLOCKING under PROGRAMMING.
NOTE:
Diagnostic Trouble Codes (DTC) 41-45 will only set while in Body Control Module (BCM) diagnostic mode and a button on remote transmitter is pressed. DTCs 42-45 are used to determine performance of remote transmitter and receiver in BCM.

Body Control Module (BCM) is equipped with a self-diagnostic system which detects system failures or abnormalities. When a malfunction occurs, BCM will store a numerical Diagnostic Trouble Code (DTC). DTCs are recorded as current or history/intermittent failures. A current DTC means a fault is present when diagnostic mode is entered. Current DTCs can be identified by number "2" preceding a DTC. For example, 21, 22, 24, etc.

A history DTC means a fault has occurred sometime after DTCs were last cleared from BCM memory. History/intermittent DTCs can be identified by number "3" preceding the DTC. For example, 31, 32, 34, etc. If a history/intermittent DTC is set, fault may be intermittent or system for which DTC is set may not be currently operating. Intermittent DTCs may be caused by problems with electrical circuit. If a visual inspection does not locate problem, vehicle may be driven with a DVOM attached to suspect circuit. Abnormal voltage or resistance readings when problem occurs indicates problem is within that circuit.

Using SECURITY Indicator

1. Turn ignition switch to RUN position to deactivate Content Theft Deterrent (CTD) alarm system (if equipped). Turn ignition switch to OFF position. Remove RADIO fuse No. 17 (15-amp) from instrument panel fuse block. RADIO fuse is located in lower right-hand corner of instrument panel fuse block.

2. Turn ignition switch to ACC position. Chime will sound 1-2 times to verify system has entered programming mode for customizing special features. Within 5 seconds, turn ignition switch to OFF position, then immediately back to ACC position. Chime will sound 3 times to verify diagnostic mode has now been entered. If chime does not sound 3 times, diagnostic mode has not been entered. Perform TEST C: CANNOT ENTER BODY CONTROL
MODULE DIAGNOSTICS under SYSTEM TESTS in BODY CONTROL MODULES - CAMARO & FIREBIRD article.

3. BCM will start to flash DTCs on SECURITY indicator 4 seconds after entering diagnostic mode. Each flash of indicator represents a number. For example, one flash followed by 2 quick flashes represents DTC 12. DTC 12 will always be the first DTC displayed, indicating diagnostic mode is at beginning of DTC display. Last DTC to be displayed will be DTC 55 followed by hardware configuration, then software configuration. Each DTC is displayed 3 times before next DTC is displayed.

4. If more than one DTC is present, DTCs will display beginning with lowest current DTC to highest current DTC, followed by lowest history DTC to highest history DTC. Remote transmitter DTCs 41-45 will then be displayed if invoked while in diagnostic mode. DTCs will cycle sequentially until diagnostic mode is exited. To exit diagnostic mode, turn ignition switch to OFF position, and install RADIO fuse.
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Thursday, August 26th, 2010 AT 12:34 PM
Tiny
DREW51
  • MEMBER
Thank you for your fast response, you certainly sound like you know what your talking about. Unfortunately, I don't know what your talking about. I hate to sound stupid, but is BCM a piece of diagnostic equipment, or a part of the car? Can I do this myself or do I need to take the car to a shop? I am wondering if it could be a bad headlight switch?
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Thursday, August 26th, 2010 AT 1:07 PM
Tiny
KHLOW2008
  • EXPERT
BCM = Body Control Module and is part of the vehicle components. Its main work is for communications among the various electronic components.

You can perform the test yourself as I have outlined for you.

Go through the post and follow the instructions. You should be able to find out if any trouble codes are present. That would help in diagnosing the fault.

A bad headlight switch would not cause the symptoms described unless when you turn on the parking lights, the headlights are briefly activated and then turns off.
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Thursday, August 26th, 2010 AT 2:02 PM
Tiny
DREW51
  • MEMBER
Thank you, I give it a try and let you know.
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Thursday, August 26th, 2010 AT 2:23 PM
Tiny
KHLOW2008
  • EXPERT
You're welcome.

Keep me updated.
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Thursday, August 26th, 2010 AT 2:54 PM
Tiny
DREW51
  • MEMBER
Could not get it to do anything. Don't know how to disable radio anti-theft or security sys. Nothing happens after turning switch to acc 2nd time. Where can I find TEST C: CANNOT ENTER BODY CONTROL MODULE DIAGNOSTICS under SYSTEM TESTS in BODY CONTROL MODULES - CAMARO & FIREBIRD article.
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Tuesday, August 31st, 2010 AT 12:28 PM
Tiny
KHLOW2008
  • EXPERT
I have sent the files to you. Let me know if it is hlepful.
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Tuesday, August 31st, 2010 AT 1:16 PM
Tiny
DREW51
  • MEMBER
1st I want to thank you for your patience and help. I decided to repair the stripped gears first. Found metal gear online for $45.00 apiece plus another 10-12 bucks for shipping. Found rebuilt motor at O'Reilly's for $65.00. Decided to go that route, worth $10 not to have to take the motors apart to replace the gears. Anyway, replaced one motor (gear was stripped all the way around. Was able to rotate the other gear 180 degrees. Grinding noise is gone and the headlights no longer go up and down when I unlock/lock the doors. Thanks again, you guys are GREAT.
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+1
Friday, September 3rd, 2010 AT 11:38 AM
Tiny
KHLOW2008
  • EXPERT
You're welcome and glad to know you have fixed the problem.

Thanks for the compliments and feedback.

Have a great day.
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Friday, September 3rd, 2010 AT 12:49 PM

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