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  #1  
Old 05-17-2019, 09:47 PM
Dubyagee's Avatar
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Join Date: Jul 2006
Location: SE
Posts: 4,666
Buzzer driving me crazy in my 87 300D

The buzzer that goes off when the glow plugs are heating up or when you leave your keys in the ignition is randomly going off while driving. Thought it was the door switch but it is working. It usually starts off in reverse but sometimes while driving. Its driving me batty. Any ideas?
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  #2  
Old 05-17-2019, 11:06 PM
sixto's Avatar
smoke gets in your eyes
 
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I think it’s a seat belt reminder, not a glow reminder.

Sixto
98 E320 wagon
02 C320 wagon
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  #3  
Old 05-17-2019, 11:06 PM
Joe
 
Join Date: May 2019
Location: Connecticut
Posts: 42
Yes, that buzzer is annoying...would be less so if it was a single frequency, but it's a mechanical-electric type with make-break contacts, so the sound is very irregular. Some day I'll hunt mine down and cut it out or replace it with a modern piezo buzzer from Allied Electronics, Mouser, or Digi-Key...if you find it, please let us know where it is, taking a pic if possible...thanks...
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  #4  
Old 05-17-2019, 11:07 PM
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I will. Its becoming personal. This electronic duck must perish.
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  #5  
Old 05-17-2019, 11:17 PM
Joe
 
Join Date: May 2019
Location: Connecticut
Posts: 42
LOL...that was a fowl post!
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  #6  
Old 05-18-2019, 02:11 AM
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Rogue T Tolerant
 
Join Date: Jul 2009
Location: North America
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One day I'll replace the buzzer with something like this:
https://www.youtube.com/watch?v=pZ301QEoo9Y
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Going back to the original post: "Can you get the vac to blow instead?" No. Vacuums are low pressure so they by nature "suck" and nature abhors them.
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  #7  
Old 05-18-2019, 11:29 AM
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Location: Texas Hill Country
Posts: 4,510
If the buzzer is coming on with things it shouldn't be activated by, it usually indicates you have a poor ground somewhere, probably behind the dash or in the instrument cluster. The 124/late 126 buzzer is transistorized and highly sensitive to crappy grounds feeding back through it. My SDL had this issue, shifting into reverse, hitting the brake pedal, opening ANY door with the headlights on, you'd get this sick squealing noise from it that just wouldn't stop. Sanding and cleaning the ground points behind the cluster and the center console fixed the issue in my car.
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The Diseasel Thread - Everything You Didn't Know You Wanted To Know
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  #8  
Old 05-18-2019, 01:14 PM
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Never let something ( or someone ) drive you crazy when you are within walking distance.
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