
68 ROUGHING IT SMOOTHLY
SERIOUS
Dear Don,
It could be a faulty camera(s). However,
this sounds like a ground wire issue that
we have seen before. Check the ground
wires for continuity and if that does not
resolve the problem, I would advise you
to see your dealer.
House Batteries Aren’t Charging
I own a 1997 Allegro with a 460 Ford
engine. When the motor is running, the
house batteries are charging. If I turn the
engine off and start the generator, the
house batteries quit charging. If I plug it
in to 110v house current, still no charge.
I have replaced both house batteries and
replaced the two 30-amp fuses in the in-
verter. What could be the problem?
Larry D. McKnight
Mineral Wells, West Virginia
Dear Larry,
When the engine is running, the house
batteries are being charged by the alterna-
tor. The 1997 Allegro should have a con-
verter and not an inverter. The converter
charges your house batteries when you
are running the generator or are plugged
into shore power. You either have a faulty
converter or the connection from the
converter to the house batteries is bad.
Chassis Battery Tender?
We have a 2013 Allegro Bus. Would you
please explain the operation of the device
in the chassis battery compartment that
appears to be a miniature battery tender?
Marylee & Howard Shaffer
Roanoke, Virginia
Dear Marylee & Howard,
The battery tender is a very low amp bat-
tery charger that charges the engine bat-
tery when you are plugged into shore
power. If you are in a campground for a
long period of time, it will prevent your
engine batteries from draining down.
Love My Motorhome, But the Wind-
shield Wipers Turn Off Randomly
I have written before and also talked to
several people at Tiffin about the wind-
shield wiper problem on my 2010 Alle-
gro QBA. Sometimes the wipers cut off
with the first wipe, and sometimes it will
happen after they have been on for five
minutes. I have wrapped and taped all
under-hood connections. I also ran an
extra ground wire to the wiper motor. I
have checked the amp draw at the motor
(maximum five amps on wet windshield),
and I replaced the wiper module above
the steering column. I can run a hot wire
to the motor and the wipers work. Please
HELP! I love this motorhome!
Sloan Trigg
Richton, Mississippi
Dear Sloan,
With all the things that you have tried un-
successfully, to discover the source of the
problem you will probably need to catch it
when it does not work. Start from the fuse
box, to the modular board, to the switch,
and to the motor itself to determine if you
are losing it through the voltage side or the
ground side. I probably am oversimplify-
ing because this is a fairly complicated sys-
tem. You may need to involve an electrical
tech to solve your problem.
Do I Need a New Carburetor?
I have a 1992 Allegro Bay 28 ft. conven-
tional that I bought new. It has been a
wonderful toy the last 20 years. The 4kw
generator (gas) starts well, but after stor-
age stops upon release of the rocker start-
er switch. It runs well until you release
the switch. My generator man says I need
a new carburetor. I think he is wrong
since twice this last year after storage and
then driving it a few miles, the generator
runs fine even after releasing the starter
switch. Is there a limiter switch that gets
charged up by driving it that causes it
to continue running when releasing the
starter switch? I cannot see that there is a
carburetor problem. At my age, 82, I don’t
need a new motorhome.
David Naumann
Enterprise, Alabama
Dear David,
I don’t think it is the carburetor. It is prob-
ably going to be the dash switch or in the
wiring harness going from the switch to
the generator. Disconnect the wiring that
connects the generator to the gen-start
switch in the dash. Then start the genera-
tor using the switch on the generator. If it
continues to run, you will know it is either
a bad dash switch or the wiring harness
from the genset to the switch. One other
possibility: the generator has a low oil
level shut-off switch located on the side of
the oil pan. Be sure to check your oil level
and the switch itself. If these two sug-
gestions do not solve your problem, you
should take it to an Onan service center.
Top Front Light Not Working
I own a 2011 Allegro 30GA. One of the
running lights above the windshield does
not light up. My RV dealer has not been
able to find the problem. The fuses are
okay. So far it has cost me $200 in shop
time. Can you help me with this problem?
André Wilson
Chateauguay, Quebec
Dear André,
Power for the upper marker light is sup-
plied from the front driver side marker
light. The power comes from this point
through the A-pillar to the top cap. You
can access the back of the lights from re-
movable panels in the back of the over-
head cabinet above the dash. It could be
one of four things: a defective bulb, a de-
fective housing, or a loose connection on
the hot side or ground side.
Doorstep Stairs Retract at the Roll
of the Dice
I have a 2010 Phaeton and have a problem
with the stairs. Sometimes they will go in
for travel, but other times they won’t. It
seems when the coach sets for three or
four days, the stairs won’t retract. At one
point, we had to take them apart because
they wouldn’t go in. When we stop, they
always go out, but it’s a roll of the dice
SERIOUS TECH TALK 69
TECH TALK
whether they go back in. I have taken it to
two different dealers who can’t find any-
thing wrong. Can you please HELP!
Len Robertson
The Villages, Florida
Dear Len,
The first item to check is the magnets on
the door and door jam to see if they are
aligned. If this is OK, look underneath
the step and find the ground wire that
is screwed to the step. Take it loose and
make sure it is clean and has no corro-
sion. Also check the power connection to
the step’s motor and the control box. Be
very careful that you are not in the way if
the step becomes activated. It could catch
your fingers in the mechanism and do a
lot of damage.
Need New Driver’s Doorstep
for 1996 Bus
I am the proud owner of a 1996 Allegro
Bus purchased through Bankston Motor-
homes in Huntsville, Alabama. My prob-
lem is that the driver’s doorstep rusted
off at the base. A friend strengthened and
re-welded it, but that only lasted one year.
Do you have anything that will replace
that step?
Frank Fenney
Ravenswood, West Virginia
Dear Frank,
We do not carry any retrofit steps in the
parts inventory. Broken steps on coaches
this old have to be repaired on a case-by-
case basis by a creditable service center
capable of doing this type of work.
Ideas and Suggestions to Consider
We own a 2011 43 QGP Allegro Bus. We
have some ideas/suggestions for you to
consider as improvements/innovations to
the Tiffin Allegro Bus (and other models).
(1) The wiper on the passenger side
of the windshield needs to be longer to
cover more of the space. Too much space
is left to the right of the blade and causes
rain to be left on the windshield that then
obstructs the driver’s view of the mirror.
(2) Move the dinette to the passenger
side of the coach so we can enjoy the view
of our own patio, versus looking at our
neighbors.
(3) Memory seats on the driver’s seat.
We both drive and it would be nice to pre-
set our preferences. Also, when the seats
are turned back around after our stay at a
campsite, it would be nice if we could just
press a button and it would all be ready
to go.
Paul & Lisa Schoonover
Hastings, Minnesota
Dear Paul & Lisa,
Thank you for your suggestions. I will be
glad to pass them on to our design team.
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