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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
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<div dir=3D"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 mot=
orhome.=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 S=
ystem) I accidentally=C2=A0shorted a 12V wire in the cargo bay lights. Ther=
e 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 t=
he Ford chassis (F-53) - one under the hood and the other inside near the p=
arking brake - plus one in the motorhome's 120V - 12V power converter. =
I could not find a blown fuse anywhere.=C2=A0<div><br></div><div>I contacte=
d the manufacturer (Thor) who has actually been quite responsive & has =
tried to help. After asking for my vehicle's VIN they emailed me some s=
chematics (not actual wire diagrams but more a map showing the general loca=
tion of outlets, switches, etc with indications of which circuit they belon=
g 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 b=
rake, another indicates they are in circuit #6 of the converter's 12V p=
anel. 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 m=
otorhome 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 ca=
n 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 rai=
l. I'm loath to rip open the wire harness trying to chase the wire furt=
her 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 be=
fore my screw up).=C2=A0<br clear=3D"all"><div><br></div>-- <br><div dir=3D=
"ltr" class=3D"gmail_signature" data-smartmail=3D"gmail_signature"><div dir=
=3D"ltr">Eric Russell<div>Mebane, NC</div></div></div></div></div></div>
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