I have a 1994 E420. The blower motor went bad, common, then the regulator, common, I fixed both. The system was working fine. My acutators are bad so I didnt have air except on the side vents and the defrost vents. So I forced the center vents to open and poped off the control arm to have center air/heat at all times. Then the blower quit, came on again and quit again then stopped completely. I thought it was the regulator again so I replaced it, no luck. I put power directly to the blower and it works fine. There seems to be no power coming to the regulator from inside the car. I put a voltage tester to the regulator, the yellow wire has power the red does not.

HELP>>>> I live in the south, it is 97 degrees and humid, I work in a business suit I have to have air.

Link fuse F15 is bad.

Near Left shock tower.

*R/L correction.................

__________________
A Dalton

Arthur, don't you mean the 30-amp strip fuse near the left (driver's side) shock tower? Loosen the 2 screws securing the 30-amp and examine it for a hairline crack across the center. A replacement costs less than $2.

__________________
Fred Hoelzle

You were right the fuse on the drivers side was blown. I touched the two connections together and the blower came on. Thanks guys.

<>

Yeah---Typo..
Drivers side .. fuse F15/30 Amp.

That is feed from Ign sw to reg/motor. Alway check those links before changing reg/motor .......very common fault.

__________________
A Dalton

The fuse was blown, like you guys said near the drivers side shock tower. I replaced it today and the blower works, ac works. I had to buy a fuse at NAPA, they didnt have one like I needed so I bought a 50AMP fuse with screw holes close enough to fit.

Now comes the new problem. I put everything back together. AC still works blower still works only now the dam thing will not go on low or off. It is stuck on HIGH....It works for me now, I needed air, but I just want it right. What do you thiink it is? It will not turn off, or low, or work on automatic, all it does is blow on high.

Help!!

A reading from red to blk @ connector. Zero
A reading from red to ground Zero
A reading from yl to bk. Zeri
A reading from yl to ground. 9V

Very Good...

Thank You..


Now , could you get me a reading at both sides of the F15 fuse with key ON ?

__________________
A Dalton

Is the F15 on the passenger side and covered with a clear plastic clip? Or is it the one I put the 50 amp fuse on?

Oh Boy...

Yes , the 50 amper.

..and Please don't tell me you did those other test with that fuse out or the key OFF...

__________________
A Dalton

If i did that the blower wouldnt have been blowing full speed. I did all the test as told. Now the test results are...

When I put the red tester probe on either side and the black tester probe on metal. It reads 7. If I touch the tester to both sides the black on one and the red on the other nothing....

A reading from red to blk @ connector. ZERO
A reading from red to ground ZERO
A reading from yl to bk. ZERO
A reading from yl to ground. 9V