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Old 08-17-2007, 10:31 PM
JamesDean's Avatar
Electrical Engineer
 
Join Date: Apr 2005
Location: NE Ohio
Posts: 5,038
w126 resistor underneath brake booster..

what is the function of this resistor? smoke keeps coming from this general vicinity. I dont believe it to be the wiring harness near it...(car is a 90 300SE)

I did a search but the only results that came back were for the blower motor.

anyone?

Thanks

Kris

EDIT: accoding to ******** that is

Beru
Radiator Fan Controller/Resistor; For Auxiliary Fan

and currently we have the aux fans wired to run 100% of the time. (temp switch on a/c dryer is jumpered.) merely a temporary testing thing nothing permanent.
could that be the cause of the smoking and whatnot having it constantly running like that? or is it something to do with the radiator fan?

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Last edited by JamesDean; 08-17-2007 at 10:40 PM.
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  #2  
Old 08-18-2007, 01:41 AM
cdplayer's Avatar
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cdplayer

Not sure of the name or function of the ceramic connector near what you may be refering to. But the resistor group (in my '84 SEC) is a metel box with a swiss cheese appearance. Inside the box are a series of coils. These are the resistors. Heat is produced by these resistors depending on the blower motor speed. Alot of heat. I caution you to keep this area free of all debris. Could cause a fire. Dry leaves, pine needles, etc. will collect here over time. I found out the hard way. I ended up replacing the resistor group and blower motor too. Fortunately for me I had the hood up, idling the car with the blower on when the fire started. Dry leaves.

The smoke you see may be a warning. Use a flash light, a long handle screw driver to move things around and a good shop vac with a narrow snout attachment to clean real good.
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  #3  
Old 08-18-2007, 02:29 AM
JamesDean's Avatar
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Join Date: Apr 2005
Location: NE Ohio
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i think we figured it out. i've remove my "hot wiring" of the aux fans...used a air compressor and shop vac to remove most of the debris..tryed to remove the fuse box to get more access..ran the car for a little and no smoke, so im inclined to believe it was the aux fans being on constantly.

here is another question: there is an 80a strip fuse in front of the brake booster (m103 based w126) what does it do?
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k
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  #4  
Old 08-18-2007, 03:42 AM
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Location: Metro Detroit, Michigan
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Answer:

Warning: all W126 owners.
Warning: all W126 owners.








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