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'[EE] Plunger Switch Source?'
2009\02\23@183749 by Carl Denk

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The tailgate latch limit switch went bad on my Ford Bronco. It is no
longer available from the usual sources. Does anyone know of a source
for something similar, here's a rough spec:

Normally closed
Is in series with what is a large window operator motor, 12 volts
Circuit protected by 20 amp breaker
Mounts with 1/2" -20 thread (male on switch), 1/2" long threads
1/4" diameter x 1/2" long plunger has 1/2" travel, but could make less
travel and shorter or longer threads work.
Wires connect with 1/4" male faston, but can make most anything work.
Connecting wires are #12.
There is some extra space behind the mounting, doesn't happen to be a
miniature component.

Any thoughts appreciated.:)

2009\02\23@185416 by Mark Scoville

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From: Carl Denk <spam_OUTcdenkTakeThisOuTspamalltel.net>
> The tailgate latch limit switch went bad on my Ford Bronco. It is no
> longer available from the usual sources. Does anyone know of a source
> for something similar, here's a rough spec:
>
> Any thoughts appreciated.:)
>

Junkyard? A photo might help if you have removed the old one.

-- Mark


2009\02\23@191945 by Carl Denk

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I could snap a photo and make a JPG, but don't have a web site to set it
out. I could though E-mail to a private address., I don't think the list
allows attachments. ~)  I was trying to stay away from junkyard, the one
I get might be on it's last legs, and Broncos aren't that familiar to
the junkyards. A lot of the other components are same as a F-150 and
easy to get.  I could though mount one of those 40 amp 12 VDC coil auto
relays, and use a lot lighter switch. I saw on some forums where guys
have removed the switch and installed a jumper, but that's not my style,
plus if the tailgate isn't latched properly and try to close the window,
the window could crack easily.

Mark Scoville wrote:
{Quote hidden}

2009\02\23@211620 by Tony Smith

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> The tailgate latch limit switch went bad on my Ford Bronco. It is no
> longer available from the usual sources. Does anyone know of a source
> for something similar, here's a rough spec:
>
> Normally closed
> Is in series with what is a large window operator motor, 12 volts
> Circuit protected by 20 amp breaker
> Mounts with 1/2" -20 thread (male on switch), 1/2" long threads
> 1/4" diameter x 1/2" long plunger has 1/2" travel, but could make less
> travel and shorter or longer threads work.
> Wires connect with 1/4" male faston, but can make most anything work.
> Connecting wires are #12.
> There is some extra space behind the mounting, doesn't happen to be a
> miniature component.


Like this http://www.jaycar.com.au/productView.asp?ID=LE8775 or this
http://www.jaycar.com.au/productView.asp?ID=LE8776 you mean?  Not sure why
they come in packs of two though.

Any car parts shop will sell you one.  They're called boot (trunk) light or
bonnet switches.  

The other style is this www.jaycar.com.au/productView.asp?ID=LE8777,
usually on doors.

Tony

2009\02\24@084824 by Carl Denk

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Thanks for the input. All of those switches are SPST, with one terminal
at ground, the other terminal is either opened or closed (depending if
N.O. or N.C.) and it doesn't say which. The original configuration is
where the switch is N.O., and compressed to open the contacts when the
tailgate is latched. Since 99% of the time the tailgate is latched, this
doesn't draw any power while the vehicle is just setting or driving. I
am considering adding the 40 amp auto relays to the circuit, which
wouldn't be difficult, but the switch needs to be open when compressed
since it would be in series and controlling the relay coil. If the relay
coil was energized all the time,I would shortly have a dead battery. The
circuit is "ON all TIMES". You can walk up to the Bronco, and roll down
the back window with a key. The window is also controlled by a dash
switch with the key in ignition and "ON". I would prefer using the wire
ground that is already there.

Tony Smith wrote:
{Quote hidden}

2009\02\24@092937 by Tony Smith

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When compressed they are open, so that's what you want.  When the
door/bonnet/trunk/boot (or tailgate in your case) is opened, then the
contact close and switch on whatever it's connected to.  I've never seen one
work the opposite way (then you'd need a relay to use these).

They're a standard part, any spares place will have them.  Take the dead one
to match sizes.

Tony



{Quote hidden}

why
> > they come in packs of two though.
> >
> > Any car parts shop will sell you one.  They're called boot (trunk) light
or
> > bonnet switches.
> >
> > The other style is this
www.jaycar.com.au/productView.asp?ID=LE8777,
> > usually on doors.
> >
> > Tony
> >
> >
> -

2009\02\24@235521 by Dave Lagzdin

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>> >> The tailgate latch limit switch went bad on my Ford Bronco. It is no
>> >> longer available from the usual sources. Does anyone know of a source
>> >> for something similar, here's a rough spec:
>> >>
>> >> Normally closed

Older style highbeam footswitch?

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