Ferrari Mailing List: Re: 308/Mondial window motor current

[rolindsay (rolindsay]

If yours work just fine you probably have great electrical connections at all 
points  between the supply and the motors. Every corroded contact between the 
battery and the motor adds resistance and since I=E/R, when R goes up, 
available current to drive the motors goes down. 

A.K.A., consider yourself lucky. :-)

Rick
Sent via BlackBerry by AT&T

-----Original Message-----
From: "Hans E. Hansen" <FList [at] hanshansen.org>

Date: Sat, 22 Nov 2008 10:14:42 
To: rolindsay<rolindsay [at] yahoo.com>
Cc: The FerrariList<ferrari [at] ferrarilist.com>
Subject: Re: [Ferrari] 308/Mondial window motor current


I guess this begs the question:  Why do mine work just fine?
Is it because the motors will function well on 9 volts; or do I
have more than 9 volts at the motor?

At present I have no need to pull the door panel, but if I do
I will definitely measure the voltage because now you have
me curious.

Hans.

On Sat, Nov 22, 2008 at 6:08 AM,  <rolindsay [at] yahoo.com> wrote:
> Hans, the problem is two fold. My window motors have been rebuilt - by me - 
> and they run great, just not so great on 9 volts.
>
> Rick
> Sent via BlackBerry by AT&T
>
> -----Original Message-----
> From: "Hans E. Hansen" <FList [at] hanshansen.org>
>
> Date: Fri, 21 Nov 2008 21:44:45
> To: rolindsay<rolindsay [at] yahoo.com>
> Cc: The FerrariList<ferrari [at] ferrarilist.com>
> Subject: Re: [Ferrari] 308/Mondial window motor current
>
>
> Hmmm...............
>
> I don't know why you guys are always intent on extra wiring, relays, etc.
> on these window motors.  The *real* problem is dried up grease - both
> in the motor gearbox and in the various pulleys, etc. in the window
> mechanism.
>
> Proof positive:  I have a nearly 35 year old car that has windows that
> operate just fine, without extra wiring or relays.  I think that it has
> survived simply because the car has never been subject to either
> extreme heat or cold.  Thus, I think..., the grease hasn't gone to a
> total state of solidification.
>
> Anyway, I think that if you totally hosed down the various pulleys,
> gears, etc. with brake clean and re-greased, you could have fully
> functioning windows and save yourself a lot of trouble.
>
> Again......   My 35 year old windows work perfectly!!!!!
>
> Hans.
>
> On Fri, Nov 21, 2008 at 9:00 PM, Paul Bennett <pbennett [at] macnet.com> 
> wrote:
>>>What is the average operating current of a 308/Mondial window motor?  And 
>>>what maximum or stall current might one expect for a sticky or stuck window? 
>>> I ask because I want to run large gauge power wires to my doors and I want 
>>>to fuse them appropriately close to the power source.  The size of that fuse 
>>>and the gauge of the wire is related to the stall current of the motor, thus 
>>>my query.  Advice?
>>
>> I recommend self-resetting 20a circuit breakers after non-predictable random 
>> popping 16A fuses in left box locations H & I.
>> Couldn't get an accurate current analysis as the stall and start surges were 
>> quite high after bypassing the switches and running voltage straight to 
>> relays in the doors.
>>
>>
>>
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