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This is getting way too complex. 200 1992

posted by lucid on Sat Nov 24 07:13 CST 2007
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last visit: Fri Oct 24 12:31 CST 2014

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When the brake pedal is pressed, the brake switch should close and deliver +12 volts to pin 9 (54S) on the Bulb Failure Sensor plug. It's the only Blue/Red wire there. Check with your voltmeter or a 12V test light.
(The ignition does NOT have to be on)

No voltage at the Blue/Red wire? Problem is "upstream" toward the pedal switch or fuse.

Voltage at Blue/Red wire OK? Suspect the Bulb Failure Sensor.
Test any or all 3 BFS outputs to brake lights for voltage. If the BFS is bad, the output voltage will be missing:
• High Brake light, BFS pin 5 (S) Blue/Black wire
• Left Brake light, BFS pin 10 (54L) Yellow/Gray wire
• Right Brake ligts, BFS pin 11 (54R) Yellow wire

--
Bruce Young
'93 940-NA (current), 240s (one V8), 140s, 122s, since '63.

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Brake lights quit working [200]
posted by dash on Thu Nov 22 13:05 CST 2007 >

Brake lights quit working [200]
posted by someone claiming to be xpdude on Thu Nov 22 13:17 CST 2007 > V

Brake lights quit working [200]
posted by rstarkie subscriber on Thu Nov 22 13:20 CST 2007 > V
- Brake lights quit working [200]
  posted by dash on Fri Nov 23 02:08 CST 2007 > V
  - Brake lights quit working [200]
    posted by rstarkie subscriber on Fri Nov 23 03:01 CST 2007 > V
    - Brake lights quit working [200]
      posted by dash on Fri Nov 23 04:53 CST 2007 > V
      - Brake lights quit working [200]
        posted by rstarkie subscriber on Fri Nov 23 05:16 CST 2007 > V
        
        Brake lights quit working [200]
        posted by dash on Fri Nov 23 05:47 CST 2007 > V
        
        Brake lights quit working [200]
        posted by rstarkie subscriber on Fri Nov 23 06:11 CST 2007 > V
        
        Brake lights quit working [200]
        posted by dash on Fri Nov 23 06:26 CST 2007 > V
        
        Brake lights quit working [200]
        posted by rstarkie subscriber on Fri Nov 23 07:27 CST 2007 > V
        
        Brake lights quit working [200]
        posted by dash on Fri Nov 23 09:30 CST 2007 > V
        
        Brake lights quit working [200]
        posted by rstarkie subscriber on Fri Nov 23 09:47 CST 2007 > V
        
        Brake lights quit working [200]
        posted by dash on Fri Nov 23 11:02 CST 2007 > V
        
        Brake lights quit working [200]
        posted by rstarkie subscriber on Fri Nov 23 12:13 CST 2007 > V
        
        Brake lights quit working [200]
        posted by dash on Sat Nov 24 06:34 CST 2007 > V
        
        Brake lights quit working [200]
        posted by rstarkie subscriber on Sat Nov 24 06:51 CST 2007 > V
        
        Brake lights quit working [200]
        posted by dash on Sat Nov 24 08:31 CST 2007 > V
        
        Brake lights quit working [200]
        posted by rstarkie subscriber on Sat Nov 24 10:56 CST 2007 > V
        
        This is getting way too complex. [200][1992]
        posted by lucid subscriber on Sat Nov 24 07:13 CST 2007 > V
        
        This is getting way too complex. [200][1992]
        posted by dash on Sat Nov 24 08:24 CST 2007 > V
        
        This is getting way too complex. [200][1992]
        posted by lucid subscriber on Sat Nov 24 09:11 CST 2007 > V
        
        This is getting way too complex. [200][1992]
        posted by dash on Sat Nov 24 11:18 CST 2007 > V
        
        Brake lights quit working [200]
        posted by Checkpoint Charlie on Fri Nov 23 12:23 CST 2007 > V
        
        Brake lights quit working [200]
        posted by dash on Sat Nov 24 06:38 CST 2007 > V
  - Brake lights quit working [200]
    posted by rstarkie subscriber on Fri Nov 23 03:33 CST 2007 > V

Brake lights quit working [200]
posted by Checkpoint Charlie on Fri Nov 23 06:54 CST 2007 > V
- Brake lights quit working [200]
  posted by dash on Fri Nov 23 10:57 CST 2007 > V
  - Brake lights quit working [200]
    posted by Checkpoint Charlie on Fri Nov 23 12:09 CST 2007 > V

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This is getting way too complex. 200 1992