Fuse # 11 (25A) indeed feeds the blower speed control and the Compressor clutch. If I run the blower without the compressor on (unplugging the pressure cut-out switch) should give it away which is at fault.
On 9/19/07, Tom Hargrave <[EMAIL PROTECTED]> wrote: > If I remember correctly, the fuse feeds more than just the blower motor. It > also feeds the AC compressor. The fuse holder could be bad but more than > likely, it's just turned dark from continuous heat. > > It's possible that your AC clutch is in trouble. Sometimes a few windings > will short out & the clutch will draw excessive current, but it will still > function. The blower motor will work fine until you put it on high where the > entire load on the fuse exceeds the fuse rating. > > Thanks, > Tom Hargrave > www.kegkits.com > 256-656-1924 > > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > On Behalf Of Hans Neureiter > Sent: Wednesday, September 19, 2007 8:49 AM > To: Mercedes Discussion List > Subject: Re: [MBZ] Blower fuse blows slow > > I neglected to mention that this applies to the '82 300 SD. There is > no added fuse. The fuse clips for this circuit, especially the bottom > one look burnet. > One other observation that bothers me is that the blower runs only at > low speed when in AUTO mode. > > On 9/19/07, Tom Hargrave <[EMAIL PROTECTED]> wrote: > > Some of the 300E's were retrofit with an in-line fuse because they did not > > have a fuse in 86 or 87. > > > > Thanks, > > Tom Hargrave > > www.kegkits.com > > 256-656-1924 > > > > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > > On Behalf Of Jim Cathey > > Sent: Wednesday, September 19, 2007 7:53 AM > > To: Mercedes Discussion List > > Subject: Re: [MBZ] Blower fuse blows slow > > > > > My blower fuse (25A) blows after a few hours of ACC operation, faster > > > if fan is run on high. > > > I suspect a bad blower motor, but is it? How about the pre-resistors > > > or the blower control? > > > Can I supply + battery V directly to the motor and see what the amps > > > are? > > > The fuse gets extremely hot (discoloration of paper in fuse box lid) > > > and the relays in the area (Power seats, Aux fan and Power windows) > > > are too hot to touch. > > > > That the fuse gets that hot indicates that you may have bad > > contacts in the fuse box itself. Take a Dremel wire brush > > to them. You may even need to get to the back side of it > > and clean the screw terminals and ring lugs. That kind of > > heat is itself sufficient to weaken a fuse and cause it to > > eventually blow. > > > > Also, were not some cars officially retrofitted to a larger > > strap fuse for the ACC blower? > > > > -- Jim > > > > > > _______________________________________ > > http://www.okiebenz.com > > For new parts see official list sponsor: http://www.buymbparts.com/ > > For used parts email [EMAIL PROTECTED] > > > > To Unsubscribe or change delivery options go to: > > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > > _______________________________________ > > http://www.okiebenz.com > > For new parts see official list sponsor: http://www.buymbparts.com/ > > For used parts email [EMAIL PROTECTED] > > > > To Unsubscribe or change delivery options go to: > > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > -- > Hans Neureiter, Houston, TX > '82 300SD, '95 E300D > > _______________________________________ > http://www.okiebenz.com > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > _______________________________________ > http://www.okiebenz.com > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > -- Hans Neureiter, Houston, TX '82 300SD, '95 E300D _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
