SL-Class (R129) 1990-2002: SL 280, SL 300, SL 320, SL 500, SL 600, SL 60 AMG

SL/R129: BLOWER MOTOR

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Old Feb 8, 2026 | 06:40 AM
  #1  
luiher's Avatar
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MERCEDES 500SL 129.066
BLOWER MOTOR

Hello,



i need some help with the blower motor that it does not work.

1.- Blower motor works directly to the battery.

2.-Regulator of the blower motors works.

3.- IF i connect directly the motor to the regulator conector it does not work. The Voltage in hte conector is 12.4 V. IF i connect the blower motor drops to 0V.

4.- I checked the blower motor wuth the negative to the car and the postive directly to the fuse and it works.

5.- I checked thte blower motor with the positive to the fuse port and the negative to the conector of the regulator and works.

6.- The topic is i have 12 V, but i do not have intesity.

What is the problems.

Thanks.
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Old Feb 9, 2026 | 09:39 AM
  #2  
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From: Rancho Bernardo
2001 SL 500
Originally Posted by luiher
Hello,



i need some help with the blower motor that it does not work.

1.- Blower motor works directly to the battery.

2.-Regulator of the blower motors works.

3.- IF i connect directly the motor to the regulator conector it does not work. The Voltage in hte conector is 12.4 V. IF i connect the blower motor drops to 0V.

4.- I checked the blower motor wuth the negative to the car and the postive directly to the fuse and it works.

5.- I checked thte blower motor with the positive to the fuse port and the negative to the conector of the regulator and works.

6.- The topic is i have 12 V, but i do not have intesity.

What is the problems.

Thanks.
You may have a bad feed wire between fuse and blower.
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Old Feb 9, 2026 | 11:41 AM
  #3  
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MERCEDES 500SL 129.066
Thanks. do you have the electric scheme of the 129.066 Thanks.
Luis
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Old Feb 10, 2026 | 06:11 AM
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MERCEDES 500SL 129.066
Originally Posted by luiher
Thanks. do you have the electric scheme of the 129.066 Thanks.
Luis
Hello. Resisior is ok. The problem is that: the plug of the regulator has voltage but no intensity. I cheked the electric diagram and i have to find the F19 ( front auxiliary box) and the fuse 15x. Do you know where are this parts? The blower motor is M2, the elwctricity is coming from the regulator N29. And the positive is coming from the F19 fuse 15x.

Is the 1 or the 2 of the image?

Thanks

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Old Feb 10, 2026 | 12:16 PM
  #5  
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MERCEDES 500SL 129.066
Hello,

also in the box number 1, there is no itnensity.

Best REgards.

Luis
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Old Feb 21, 2026 | 09:49 AM
  #6  
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MERCEDES 500SL 129.066
Hello,
The problem is the "clausor". It is the part 11. Bad contact. ( open de rear part of the piece and sand the contact areas. Works perfectly.

Best Regards and THANKS!!
Luis

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