Transfer switch?

T

Thigh19

New member
Aug 4, 2019
86
0
1
My 73 Sequoia’s generator starts, and runs, but supplies no power to the coach. When i plug in shore power everything works as it should. Doing an
internet search, probably dangerous, people are saying “bad transfer switch””. Not knowing enough about the electrical system of these coaches,
i could sure use some guidance.
Thanx in advance
Thom High
1973 Sequoia
Vancouver Wa
 
Transfer switches are NOT OEM on a GMC and odds are you do not have one.

Did you move the big Black cable the plugs into the shore power and plug it into the receptical behind the little door where the cable is normally
stored?

Ken B.
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
 
Perhaps the generator is not producing power because of a failed bridge rectifier. Inexpensive and easy fix.

Larry Davick
76 Palm Beach

>
> Transfer switches are NOT OEM on a GMC and odds are you do not have one.
>
> Did you move the big Black cable the plugs into the shore power and plug it into the receptical behind the little door where the cable is normally
> stored?
>
> Ken B.
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
 
> Transfer switches are NOT OEM on a GMC and odds are you do not have one.
>
> Did you move the big Black cable the plugs into the shore power and plug it into the receptical behind the little door where the cable is normally
> stored?
>
> Ken B.

I did, wiggled and checked. Checked the main breaker on the generator too.
 
OK, The next thing to check is the a circuit breaker mounted at the very top center on the generator. It could be either a push button or a toggle
switch type breaker. Check it with a volt meter looking for 120 volts to ground. Check both sides of the breaker. It is mounted in a little green
box and held in place with a couple of bolts. You will have to de-mount it in order to get to the terminals to take a reading.

If there no voltage there then we need to look into the generators itself. The could be a couple of different things that could cause this but let's
hold off on this until we decide if it really is not making power.

On side note. If it is indeed not making power, DO NOT touch the circuit board. That board has nothing to do with generating power.

Ken B.
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
 
Let's also remember, if we end up replacing the rectifier, there are 16 possible ways to connect it and only one of them will work. Pay very close
attention to where each wire goes, two AC, one + and one -.

--johnny
--
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
 
The transfer switch was an option on Coachman built GMCs. I've had 4 Royales.2 that we used. All those had the transfer switch. Absolutely love them. Why? Because I'm extremely lazy. And that's my legal right. (GRIN) Bob Dunahugh
 
> The transfer switch was an option on Coachman built GMCs. I've had 4 Royales.2 that we used. All those had the transfer switch. Absolutely love
> them. Why? Because I'm extremely lazy. And that's my legal right. (GRIN) Bob Dunahugh
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

Automatic Transfer Switch or manual? (the big manual switch in the closet)
--
Larry
78 Royale w/500 Caddy
Menomonie, WI.
 
He has got a 1973 Sequoia. I doubt he has a transfer switch.
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
 
Bob,
None of the Coachman or any other model had an automatic transfer switch.

On Sun, Jul 5, 2020 at 6:29 PM Ken Burton via Gmclist <

> He has got a 1973 Sequoia. I doubt he has a transfer switch.
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.gmcrvparts.com
1-800-752-7502
 
My beloved PO installed an automatic transfer switch that I didn’t realize wasn’t stock for some time.

>
> Bob,
> None of the Coachman or any other model had an automatic transfer switch.
>
>> On Sun, Jul 5, 2020 at 6:29 PM Ken Burton via Gmclist <

>>
>> He has got a 1973 Sequoia. I doubt he has a transfer switch.
>> --
>> Ken Burton - N9KB
>> 76 Palm Beach
>> Hebron, Indiana
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
> --
> Jim Kanomata
> Applied/GMC, Newark,CA
> jimk
> http://www.gmcrvparts.com
> 1-800-752-7502
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
 
If you were to install an auto transfer switch, be sure to get one with DC coils in the contactors. If you don't you'll be driven nuts by the 60 cycle
hummmmmm.
Hal
--
"I enjoy talking to you. Your mind appeals to me. It resembles my own mind, except you happen to be insane."

1977 Royale 101348,

1977 Royale 101586, Diesel powered,

1974 Eagle Bus 45',w/slideout,

Rio Rancho, NM
 
I changed all of that stuff when I converted my rear bunks and rear cabinet
into a queen size bed that goes across the access to the breakers and buzz
box. I left the toggle breakers, discarded the buzz box battery destroyer
for a Progressive Dynamics converter. I added an automatic transfer switch,
and the only time I look into the compartment is when I periodically check
for loose connections or leaks or vermin chewing on stuff. My transfer
switch has a built in 30 second delay before connecting to the generator to
allow time for it to stabilize output and frequency. Much better setup for
the way we use the coach.
Jim Hupy
Salem, Oregon

On Sun, Jul 5, 2020, 9:07 PM Larry Davick via Gmclist <

> My beloved PO installed an automatic transfer switch that I didn’t realize
> wasn’t stock for some time.
>
> > On Jul 5, 2020, at 8:52 PM, Jim Kanomata via Gmclist <

> >
> > Bob,
> > None of the Coachman or any other model had an automatic transfer switch.
> >
> >> On Sun, Jul 5, 2020 at 6:29 PM Ken Burton via Gmclist <

> >>
> >> He has got a 1973 Sequoia. I doubt he has a transfer switch.
> >> --
> >> Ken Burton - N9KB
> >> 76 Palm Beach
> >> Hebron, Indiana
> >>
> >> _______________________________________________
> >> GMCnet mailing list
> >> Unsubscribe or Change List Options:
> >> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >>
> >
> >
> > --
> > Jim Kanomata
> > Applied/GMC, Newark,CA
> > jimk
> > http://www.gmcrvparts.com
> > 1-800-752-7502
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
 
My 77 Royale came with the standard 30 Amp service. When we "Gutted it for renovation" I rewired it to a 50 Amp service. We removed the Propane and
went totally electric. With the 50 Amp service we ran a leg down each side of the coach with its own transfer switch. The passenger side is a power
center that handles the Air Conditioner, refrigerator (120/12v unit) and the D.C distribution. This way when on shore power each leg is isolated
giving us 50 Amps on each side. When the generator is engaged the transfer switches allow for the single leg service from the generator to power both
sides of the coach. The driver side powers the Hot Water heater, Microwave and basically all the kitchen appliances.
--
Tom McManus
1977 Royale

Chesapeake VA
 
You must log in or register to reply here.
Applied GMC
GMCMI Fall 2026 Rally

Share this page

Share this page
Top Bottom
Back