Where is the heater blower motor fuse located, 1993 M-B 300D 2.5 Turbo with automatic heater / AC?

Thanks, Lgriffi

Should be over near the drivers side strut tower ..in a little box,
F-15 fuse link.

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A Dalton

Thanks Art
Found the fuse, it is OK, have voltage both sides, still no blower.
Lgriffi

Jumper the fuse to make sure ...they open under load, so they can read good w/meter, but bad with blower draw....

If OK , then check the 3 wire plug on the firewall behind booster. That is blower/regulator feed;
!2 across red/blk... variable 2-9v across yl/blk

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A Dalton

Thanks Art, I tested the fuse, OK, I went ahead and installed a new fuse, still no heater blower and winter is setting in.
Lgriffi

Then do the next test I posted...

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A Dalton

Hi Art
Have preformed the second test, have 12.9 V across the black and red terminals and 1.9 V across the black and yellow terminals. I guess this indicates a problem with the blower / regulator. Where will I find the blower regulator compartment? Is it behind the wiper assy.?
Regards, Lgriffi

Put the CP on defrost to see if you can get that trigger V up some..
B/R and down under wiper assem...

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A Dalton

Hi Art
Voltage between black and yellow wire with push buttons in defrost position is 2,7 V.
Thanks for the help.
Lgriffi

That means ya gotta go diggin...

When you get in there , ground the blu wire and also try to turn the fan by hand to see if it is bound up...........ATF works sometimes.

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A Dalton

Hi Art
Thanks for sharing your knowledge and information with me. I will go diggin latter in the week.
Thanks again. Lgriffi

There is a DIY, step by step, w/pics on the Forum
Use the Resources section on top of the page and you will find Blower Replace..

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A Dalton

ive got the same goin on my 1990 300e are these bolth 124s? because i need to do the same tests thanks