Re relays for Electric Window Motors

["Fern Rivard" <crc@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>]

   There shouldn't be any problems in using what we used to call the 
"auxiliary lights" relays or "horn relays" we have been used for years 
to trigger the horn in vehicles equipped with radio telephones and two 
way radios when a call was received. We have found that those compact 
relays worked just as well as the larger normal horn relays but these 
had the advantage of being very compact and very inexpensive to replace. 
Also, remember that the duty cycle of  operating power windows is not 
for such a long duration and not repeated that often.
   Just my 2 cents worth from Fern in cold wintery Cranbrook SE British 
Columbia



----- Original Message ----- 
From: "whuff" <whuff@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
To: "Paul Holmgren" <paulholm@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>; "Marshall Larson" 
<yelof@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
Cc: <chrysler300@xxxxxxxxxxxxxxx>; <hurst300@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>; 
<Chrysler300E@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
Sent: Thursday, November 30, 2006 8:56 PM
Subject: Re: [Chrysler300] Subject: Electric Window Motors


> The possible sources of the relays are good to know.
>
> One of the reasons I went with the larger heavier relays rather than
> a newer and more compact design was that I had some doubts about the
> design of the smaller relays.  I believe they are primarily made for
> resistive lighting loads where a straight across the board amperage
> rating will work.
>
> The motors should appear to be  almost a dead short on starting until
> they rotate and a reverse EMF is built up.  On opening, the relay
> contacts may also have to withstand an inductive kick that could drag
> a spark across small contacts that didn't open quickly or far
> enough.  Over time, my thinking went, and still does, these
> conditions may pit or damage the contacts, leading to a short
> life.  If anyone has experience with the Bosch type relays used as
> motor controllers, I would like to hear from them.
>
> Gee, if I could only find my old MG, I could get some relays from
> Lucas, Prince of Darkness.  :-D
>
>
> Bill Huff
> At 11/30/200608:40 PM, Paul Holmgren wrote:
>
> > Possible secondary source for relays:
> >
> > Autozone-  The Pilot relay model number on the packaging card is 
> > PL-RY1
> >
> > rated 30A,  TESTED load for window motors is in the 13A to 15A range,
> > shop manual says 15A
> >
> > suitability of these UNknown to me yet!!! But could very well be 
> > workable
> >
> >
> > --
> > Paul Holmgren
> > 2 57 300-C's in Indy
> > Hoosier Corps L#6
> >
> >
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