<div dir="ltr">> How are you verifying that the fuses are good? If you are just looking at them, they may still be bad or making a poor connection. Use a volt meter & measure voltage on both ends of the fuses to verify them.<p>Initially, I just pulled the likely fuses for a visual inspection. When that came up empty, I used my Horrible Fright ohm meter to confirm continuity between the two terminals of the fuses. I've swapped in known good fuses to no avail. I have checked (at least visually) every fuse I can locate. I am 99% certain there must be another fuse somewhere. If you have experience working on motorhomes you'll know anything is possible... </p><p>Me no see video - link missing? </p><p>> I can walk you through the troubleshooting if you need help. </p><p>Yes, please - t y p e s l o w l y . . . </p><p>EjR </p></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Nov 10, 2021 at 8:01 PM Pat Horne <<a href="mailto:patintexas@icloud.com">patintexas@icloud.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<p>Here's a video of using the tool. Since you have only one wire,
the other clip should go to groud.</p>
<p>Peace,</p>
<p>Pat<br>
</p>
<div>On 11/10/2021 6:15 PM, Eric Russell
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">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.
<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 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.
<div><br>
</div>
<div>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. </div>
<div><br>
</div>
<div>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.</div>
<div><br>
</div>
<div>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). <br clear="all">
<div><br>
</div>
-- <br>
<div dir="ltr">
<div dir="ltr">Eric Russell
<div>Mebane, NC</div>
</div>
</div>
</div>
</div>
</div>
<br>
<fieldset></fieldset>
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</pre>
</blockquote>
<pre cols="72">--
We support Habitat for Humanity, a hand UP, not a hand OUT</pre>
</div>
</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr">Eric Russell<div>Mebane, NC</div></div></div>