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Re: [Shop-talk] Finding a Blown Fuse (Automotive)

Subject: Re: [Shop-talk] Finding a Blown Fuse (Automotive)
From: Eric Russell <ejrussell61@gmail.com>
Date: Thu, 11 Nov 2021 17:59:50 -0500
Cc: Shop Talk <shop-talk@autox.team.net>
Delivered-to: mharc@autox.team.net
Delivered-to: shop-talk@autox.team.net
References: <CAP7dBXAUkTD2CXpZES70onWfajOE3XgaUxhfUH2xjqkWwoPfYA@mail.gmail.com> <91336799-ba3a-6ab6-cad2-31eedb0f5a76@swiftrecruiters.com> <CAP7dBXC_F3XmhoLHfHyik57mt=bbU5Yv=2PJQxLq0vto+hi60g@mail.gmail.com> <CAP7dBXCcPxagn6q-RNXT-i+-o-i6cVfk2yE_OD6igS6D+ig9aw@mail.gmail.com>
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Correction - the hidden in plain view fuse was labeled F31. That
designation was never mentioned in any of my emails with Thor or their
schematics. I do not know if this part was installed by Thor or some
aftermarket modification.

EjR


On Thu, Nov 11, 2021 at 5:51 PM Eric Russell <ejrussell61@gmail.com> wrote:

> So, the blown fuse turned out to be an I-D-10-T issue. When I crawled up
> under the hood of the new (to us) motorhome to change the oil (they do not
> make this an easy task...) I noticed a box way over on the left side
> labeled "Battery Control Center (Fuses Inside)". And buried therein was
> fuse # F17 'Cargo Lights'. Which indeed was blown. Maybe Thor (the
> motorhome manufacturer) was trying to tell me to check there - but I
> clearly described the place I had checked was the Ford "Power Distribution
> Box".
>
> EjR
>
>
> On Thu, Nov 11, 2021 at 8:57 AM Eric Russell <ejrussell61@gmail.com>
> wrote:
>
>> Thanks for the replies. It may be a week or more before I gather the
>> energy to search for the fault again. I've already wasted two afternoons
>> and have other more important things to do (getting ready to go racing in
>> VRG's Turkey Bowl at Summit Point, WV). The idea of using a tone generating
>> tool is interesting. Horrible Fright has a $25 version - I may give that a
>> try.
>>
>> EjR
>>
>>
>> On Thu, Nov 11, 2021 at 8:12 AM John <jbach@swiftrecruiters.com> wrote:
>>
>>> How about a GFCI outlet that has tripped?
>>>
>>>
>>> On 11/10/2021 7:15 PM, Eric Russell wrote:
>>>
>>> Oh wise & beneficent Shop Talkers - I've run into a situation that has
>>> me stymied. I need help locating a blown fuse in a motorhome.
>>>
>>> We recently bought a new (to us) motorhome. When installing the signal
>>> booster for a TPMS (Tire Pressure Monitoring System) I accidentally shorted
>>> a 12V wire in the cargo bay lights. There was a small spark (followed by a
>>> few swear words). I then went on a hunt for the blown fuse. There are three
>>> fuse panels in this motorhome. Two in the Ford chassis (F-53) - one under
>>> the hood and the other inside near the parking brake - plus one in the
>>> motorhome's 120V - 12V power converter. I could not find a blown fuse
>>> anywhere.
>>>
>>> I contacted the manufacturer (Thor) who has actually been quite
>>> responsive & has tried to help. After asking for my vehicle's VIN they
>>> emailed me some schematics (not actual wire diagrams but more a map showing
>>> the general location of outlets, switches, etc with indications of which
>>> circuit they belong to). There are two schematics that appear to apply to
>>> my motorhome - one indicates the cargo lights are connected to the Ford
>>> panel by the parking brake, another indicates they are in circuit #6 of the
>>> converter's 12V panel. Neither of those fuses are blown. While there I
>>> checked all the fuses I could locate - none were blown. I've also signed up
>>> to a couple of motorhome forums but have not been able to find an answer
>>> there.
>>>
>>> Finally - my plea for help - is there any device one can use to trace
>>> where a circuit originates? I've seen an electrician use a device to find
>>> out what outlet goes to which breaker in our house.
>>>
>>> I've followed the hot wire from the cargo bay light back to where it
>>> enters a wire harness along the motorhome's frame rail. I'm loath to rip
>>> open the wire harness trying to chase the wire further upstream. As far as
>>> I can tell there is nothing else in this circuit - everything else is
>>> working properly. Of course I can live without cargo bay lights but it
>>> bothers my OCD to have it not working (when I know it did before my screw
>>> up).
>>>
>>> --
>>> Eric Russell
>>> Mebane, NC
>>>
>>> _______________________________________________
>>> Shop-talk@autox.team.net
>>> Donate: http://www.team.net/donate.html
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>>> Archive: http://www.team.net/pipermail/shop-talk 
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>>>
>>> Unsubscribe/Manage: 
>>> http://autox.team.net/mailman/options/shop-talk/jbach@swiftrecruiters.com
>>>
>>> _______________________________________________
>>>
>>> Shop-talk@autox.team.net
>>> Donate: http://www.team.net/donate.html
>>> Suggested annual donation  $12.96
>>> Archive: http://www.team.net/pipermail/shop-talk
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>>>
>>> Unsubscribe/Manage:
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>>>
>>>
>>
>> --
>> Eric Russell
>> Mebane, NC
>>
>
>
> --
> Eric Russell
> Mebane, NC
>


-- 
Eric Russell
Mebane, NC

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Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Correction - the hidden in plain view fuse was labeled F31=
. That designation was never mentioned in any of my emails with Thor or the=
ir schematics. I do not know if this part was installed by Thor or some aft=
ermarket modification.=C2=A0<div><br></div><div>EjR=C2=A0</div><div><br></d=
iv></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_att=
r">On Thu, Nov 11, 2021 at 5:51 PM Eric Russell &lt;<a href=3D"mailto:ejrus=
sell61@gmail.com">ejrussell61@gmail.com</a>&gt; wrote:<br></div><blockquote=
 class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px so=
lid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr">So, the blown fuse =
turned out to be an I-D-10-T issue. When I crawled up under the hood of the=
=C2=A0new (to us) motorhome to change the oil (they do not make this an eas=
y task...) I noticed a box way over on the left side labeled &quot;Battery =
Control Center (Fuses Inside)&quot;. And buried therein was fuse # F17 &#39=
;Cargo Lights&#39;. Which indeed was blown. Maybe Thor (the motorhome manuf=
acturer) was trying to tell me to check there - but I clearly described the=
 place I had checked was the Ford &quot;Power Distribution Box&quot;.=C2=A0=
<div><br></div><div>EjR=C2=A0</div><div><br></div></div><br><div class=3D"g=
mail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Thu, Nov 11, 2021 at 8=
:57 AM Eric Russell &lt;<a href=3D"mailto:ejrussell61@gmail.com"; target=3D"=
_blank">ejrussell61@gmail.com</a>&gt; wrote:<br></div><blockquote class=3D"=
gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(20=
4,204,204);padding-left:1ex"><div dir=3D"ltr">Thanks for the replies. It ma=
y be a week or more before I gather the energy to search for the fault agai=
n. I&#39;ve already wasted two afternoons and have other more important thi=
ngs to do (getting ready to go racing in VRG&#39;s Turkey Bowl at Summit Po=
int, WV). The idea of using a tone generating tool is interesting. Horrible=
 Fright has a $25 version - I may give that a try.=C2=A0<div><br></div><div=
>EjR=C2=A0</div><div><br></div></div><br><div class=3D"gmail_quote"><div di=
r=3D"ltr" class=3D"gmail_attr">On Thu, Nov 11, 2021 at 8:12 AM John &lt;<a =
href=3D"mailto:jbach@swiftrecruiters.com"; target=3D"_blank">jbach@swiftrecr=
uiters.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=
=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding=
-left:1ex">
 =20
   =20
 =20
  <div>
    <p>How about a GFCI outlet that has tripped?</p>
    <p><br>
    </p>
    <div>On 11/10/2021 7:15 PM, Eric Russell
      wrote:<br>
    </div>
    <blockquote type=3D"cite">
     =20
      <div dir=3D"ltr">Oh wise &amp; beneficent Shop Talkers - I&#39;ve run
        into a situation that has me stymied. I need help locating a
        blown fuse in a motorhome.=C2=A0
        <div><br>
        </div>
        <div>We recently bought a new (to us) motorhome. When installing
          the signal booster for a TPMS (Tire Pressure Monitoring
          System) I accidentally=C2=A0shorted a 12V wire in the cargo bay
          lights. There was a small spark (followed by a few swear
          words). I then went on a hunt for the blown fuse. There are
          three fuse panels in this motorhome. Two in the Ford chassis
          (F-53) - one under the hood and the other inside near the
          parking brake - plus one in the motorhome&#39;s 120V - 12V power
          converter. I could not find a blown fuse anywhere.=C2=A0
          <div><br>
          </div>
          <div>I contacted the manufacturer (Thor) who has actually been
            quite responsive &amp; has tried to help. After asking for
            my vehicle&#39;s VIN they emailed me some schematics (not actua=
l
            wire diagrams but more a map showing the general location of
            outlets, switches, etc with indications of which circuit
            they belong to). There are two schematics that appear to
            apply to my motorhome - one indicates the cargo lights are
            connected to the Ford panel by the parking brake, another
            indicates they are in circuit #6 of the converter&#39;s 12V
            panel. Neither of those fuses are blown. While there I
            checked all the fuses I could locate - none were blown. I&#39;v=
e
            also signed up to a couple of motorhome forums but have not
            been able to find an answer there.=C2=A0</div>
          <div><br>
          </div>
          <div>Finally - my plea for help - is there any device one can
            use to trace where a circuit originates? I&#39;ve seen an
            electrician use a device to find out what outlet goes to
            which breaker in our house.</div>
          <div><br>
          </div>
          <div>I&#39;ve followed the hot wire from the cargo bay light back
            to where it enters a wire harness along the motorhome&#39;s
            frame rail. I&#39;m loath to rip open the wire harness trying t=
o
            chase the wire further upstream. As far as I can tell there
            is nothing else in this circuit - everything else is working
            properly. Of course I can live without cargo bay lights but
            it bothers my OCD to have it not working (when I know it did
            before my screw up).=C2=A0<br clear=3D"all">
            <div><br>
            </div>
            -- <br>
            <div dir=3D"ltr">
              <div dir=3D"ltr">Eric Russell
                <div>Mebane, NC</div>
              </div>
            </div>
          </div>
        </div>
      </div>
      <br>
      <fieldset></fieldset>
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</pre>
    </blockquote>
  </div>
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</blockquote></div><br clear=3D"all"><div><br></div>-- <br><div dir=3D"ltr"=
><div dir=3D"ltr">Eric Russell<div>Mebane, NC</div></div></div>
</blockquote></div><br clear=3D"all"><div><br></div>-- <br><div dir=3D"ltr"=
><div dir=3D"ltr">Eric Russell<div>Mebane, NC</div></div></div>
</blockquote></div><br clear=3D"all"><div><br></div>-- <br><div dir=3D"ltr"=
 class=3D"gmail_signature"><div dir=3D"ltr">Eric Russell<div>Mebane, NC</di=
v></div></div>

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