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Old 11-06-2005, 10:01   #1 (permalink)
mccaldwell2@adelphia.net
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'92 240--blower motor stopped

Out of nowhere, the blower motor on '92 240 has stopped working.
Neither speed switch nor AC toggle (usually automatically turns on to
low speed) will activate fan. Fuses 3 and 12 appear intact. ALLDATA
mentions a blower motor relay, but nothing as to location. Only related
relay with location shown is the AC relay behind center console near
bottom of pass side. Does power to switch control also go through this
relay, making this the likely problem? Any test other than replacing?
Any place else to look for solution?
Thanks.

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Old 11-06-2005, 17:01   #2 (permalink)
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Re: '92 240--blower motor stopped

In article <1131296459.297980.57300@z14g2000cwz.googlegroups.com>,
mccaldwell2@adelphia.net says...
> Out of nowhere, the blower motor on '92 240 has stopped working.
> Neither speed switch nor AC toggle (usually automatically turns on to
> low speed) will activate fan. Fuses 3 and 12 appear intact. ALLDATA
> mentions a blower motor relay, but nothing as to location. Only related
> relay with location shown is the AC relay behind center console near
> bottom of pass side. Does power to switch control also go through this
> relay, making this the likely problem? Any test other than replacing?
> Any place else to look for solution?
> Thanks.
>
>

Power from the key goes to the A/C relay that when switched on applies
power to the resistor block allowing #1 speed when the blower switch is
off. Power from the key travels directly from the switch to the resistor
block, to the motor. The spped is controlled by which wire grom the
switch provides power to which resistor stack to allow each of the
possible speeds. #4 speed is direst to the motor. It sounds like the
motor has gone belly up. Everything you need to gain access to is
enclosed in the heater box.

Bob
--
The goal when driving is to miss the maximum number of objects.
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Old 11-06-2005, 20:01   #3 (permalink)
mccaldwell2@adelphia.net
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Re: '92 240--blower motor stopped

That's definitely not the answer I wanted to hear (though clearly may
be the correct one and with your wiring description, not really any
other options). I've been driving 240s for many, many years and have
never had a blower motor go without first living through months, or
even years, of noise. Is there any other possibility at all? '92 and
'93 were a bit different than former years. And, again, ALLDATA lists a
specific "blower motor relay" but without any further description.
Thanks.


User wrote:
> In article <1131296459.297980.57300@z14g2000cwz.googlegroups.com>,
> mccaldwell2@adelphia.net says...
> > Out of nowhere, the blower motor on '92 240 has stopped working.
> > Neither speed switch nor AC toggle (usually automatically turns on to
> > low speed) will activate fan. Fuses 3 and 12 appear intact. ALLDATA
> > mentions a blower motor relay, but nothing as to location. Only related
> > relay with location shown is the AC relay behind center console near
> > bottom of pass side. Does power to switch control also go through this
> > relay, making this the likely problem? Any test other than replacing?
> > Any place else to look for solution?
> > Thanks.
> >
> >

> Power from the key goes to the A/C relay that when switched on applies
> power to the resistor block allowing #1 speed when the blower switch is
> off. Power from the key travels directly from the switch to the resistor
> block, to the motor. The spped is controlled by which wire grom the
> switch provides power to which resistor stack to allow each of the
> possible speeds. #4 speed is direst to the motor. It sounds like the
> motor has gone belly up. Everything you need to gain access to is
> enclosed in the heater box.
>
> Bob
> --
> The goal when driving is to miss the maximum number of objects.


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Old 11-06-2005, 21:02   #4 (permalink)
mccaldwell2@adelphia.net
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Re: '92 240--blower motor stopped

Looking at the wiring diagram, it looks like all lines (direct as well
as AC relay delivered) run through the fan switch on way to blower
motor. If plug to back of switch is pulled, would no blower power under
all conditions result??

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Old 11-06-2005, 21:02   #5 (permalink)
mccaldwell2@adelphia.net
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Re: '92 240--blower motor stopped

Looking at the wiring diagram, it looks like all lines (direct as well
as AC relay delivered) run through the fan switch on way to blower
motor. If plug to back of switch is pulled, would no blower power under
all conditions result??

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Old 11-07-2005, 00:01   #6 (permalink)
James Sweet
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Re: '92 240--blower motor stopped

mccaldwell2@adelphia.net wrote:
> That's definitely not the answer I wanted to hear (though clearly may
> be the correct one and with your wiring description, not really any
> other options). I've been driving 240s for many, many years and have
> never had a blower motor go without first living through months, or
> even years, of noise. Is there any other possibility at all? '92 and
> '93 were a bit different than former years. And, again, ALLDATA lists a
> specific "blower motor relay" but without any further description.
> Thanks.
>



It's easy to check, find the wire going to the motor and measure the
voltage on it with the fan turned on, if you get 12V and the motor isn't
running then the motor is bad.

I found that replacing it isn't really as terrible as I would have
thought, I did it on my mom's 240 last year and while it took me about 4
hours, a good portion of that was trying to get the stupid blower wheel
off one side where it had stuck on there really firmly.
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