Home » Public Forums » GMCnet » wiring diagram and eng throttle stop (cx or FY)
| wiring diagram and eng throttle stop [message #337702] |
Mon, 08 October 2018 15:26  |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
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Senior Member |
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I went out and assisted someone with a problem with there 78 Royale, with a 403 engine.
What looks to me what happened, is that where there used to be a Throttle stop solenoid(emissions piece?) that is no longer there, the connector was still hanging loose.
a wire(I believe some tanish color) came out of the connector and welded itself to the engine and smoked that wire. It toasted what I think was all the way into the wiring loom on passenger side, burnt off what was the feed to the distributor, and then cooked the rest of the wire up near the harness block.
there was a green wire still isolated on the connector.
I spliced onto a black with green stripe wire, that also looks to be the correct feed to the distributor, and ran a new wire to the distributor to get the engine fired back up.
I pulled the green wire out of the loom that was on that connector and zip tied it up by the harness block. (used it to help feed the new distributor wire through the loom).
Luckily no other wires were cooked in the wiring harness.
Looking at the wiring diagram now,(not at gas station parking lot), I see a box with the letters CX in it showing a wire color change from pink to black double white stripe that is feeding the distributor.
then looking at the other side of the throttle stop solenoid in the diagram, there is a box with the letters FY.
just trying to learn what those mean? I am guessing CX is basically the harness block. the colors in this diagram seem to vary from the wires I found, but the "pink" wire would of been the burnt to hell one, as what parts where left of the insulation looked tan to me. and the other wire in that connector sure looked way more green then light blue.
here is the wiring diagram I am looking at:
http://www.bdub.net/wirediagrams/78-transmode-chassis-electrolevel-II.pdf
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
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| Re: [GMCnet] wiring diagram and eng throttle stop [message #337704 is a reply to message #337702] |
Mon, 08 October 2018 17:31  |
JerryW
Messages: 256
Registered: August 2018
Karma: 1
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Senior Member |
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Jon
Down at the bottom of the wiring diagram is a section called: Circuit Identification.
The first item say AS thru EZ and those are just connection points in the harness assembly connection block.
Your CX would be one of the connection points on that large connection block.It says it is a 40 connector block
Your FY is just another connection pointon a connector block although it does not seem to be identified in that section.
It is where the 12 gage pink wire connects to th 18 gauge Black DBL WHT stripe wire in another connector block.
Emery Stora
77 Kingsley
Frederick, CO
> On Oct 8, 2018, at 2:26 PM, Jon Roche wrote:
>
> I went out and assisted someone with a problem with there 78 Royale, with a 403 engine.
>
> What looks to me what happened, is that where there used to be a Throttle stop solenoid(emissions piece?) that is no longer there, the connector was
> still hanging loose.
>
> a wire(I believe some tanish color) came out of the connector and welded itself to the engine and smoked that wire. It toasted what I think was all
> the way into the wiring loom on passenger side, burnt off what was the feed to the distributor, and then cooked the rest of the wire up near the
> harness block.
>
> there was a green wire still isolated on the connector.
>
> I spliced onto a black with green stripe wire, that also looks to be the correct feed to the distributor, and ran a new wire to the distributor to
> get the engine fired back up.
>
> I pulled the green wire out of the loom that was on that connector and zip tied it up by the harness block. (used it to help feed the new distributor
> wire through the loom).
>
> Luckily no other wires were cooked in the wiring harness.
>
> Looking at the wiring diagram now,(not at gas station parking lot), I see a box with the letters CX in it showing a wire color change from pink to
> black double white stripe that is feeding the distributor.
>
> then looking at the other side of the throttle stop solenoid in the diagram, there is a box with the letters FY.
>
> just trying to learn what those mean? I am guessing CX is basically the harness block. the colors in this diagram seem to vary from the wires I
> found, but the "pink" wire would of been the burnt to hell one, as what parts where left of the insulation looked tan to me. and the other wire in
> that connector sure looked way more green then light blue.
>
> here is the wiring diagram I am looking at:
>
> http://www.bdub.net/wirediagrams/78-transmode-chassis-electrolevel-II.pdf
> --
> Jon Roche
> 75 palm beach
> St. Cloud, MN
> http://lqqkatjon.blogspot.com/
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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| [GMCnet] Re: Wiring diagram [message #369565 is a reply to message #369562] |
Tue, 26 April 2022 12:43 |
Kimberlea Weeks
Messages: 675
Registered: July 2010
Karma: 6
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Senior Member |
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Alan Henderson listed at: https://www.gmcmi.com/suppliers/
*Kimberlea Weeks | GMC Motorhomes International *
Vice President of Administration | Convention Manager
Admin Address: 1214 N Jefferson Way, Ste 352, Indianola, IA 50125-1400
612.501.4600 | f.866.519.0047 | www.gmcmi.com
Corporate Address: 1402 S Cage Blvd, Unit 273 | Pharr, TX 78577-6288
On Tue, Apr 26, 2022 at 12:17 PM James Hupy wrote:
> If you have a GMC Shop manual for your coach, there is a wiring diagram in
> the back of it. Failing that, Ken Henderson's son does diagrams for nearly
> every year and model. Also, GMCMI has them.
> Jim Hupy
> Salem, Oregon
>
> On Tue, Apr 26, 2022, 10:12 AM Hanson Email wrote:
>
>> Does anyone have a wiring diagram for a 1976 23' Birchaven they can send
>> me?
>>
>> Or direct me?
>>
>> TIA.
>>
>> Dean Hanson
>>
>> 1975 Avion.
>>
>> Fremont Ca.
>>
>>
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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| [GMCnet] Re: Wiring diagram [message #369571 is a reply to message #369569] |
Wed, 27 April 2022 11:25 |
Dave Stragand
Messages: 307
Registered: October 2017
Karma: 0
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Senior Member |
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It's just how it got tweaked by his email program. Try this:
http://www.bdub.net/wirediagrams/
or
www dot bdub dot net slash wirediagrams
-Dave
1978 Transmode near Pittsburgh
________________________________
From: K2GKK D C_Mac_ Macdonald
Sent: Wednesday, April 27, 2022 11:56 AM
To: gmclist@list.gmcnet.org
Subject: [GMCnet] Re: Wiring diagram
That URL blocked by my computer's protection
software as containing a TROJAN.
D C "Mac" Macdonald
Amateur Radio - K2GKK
Since 30 Novemb'53
USAF and FAA, Ret'd
Member GMCMI and Classics
Oklahoma City, OK
"The Money Pit"
TZE166V101966
'76 ex-Palm Beach
k2gkk + hotmail dot com
wwww.gmcmhphotos.com/okclb
________________________________
From: Billy Massey
Sent: Wednesday, April 27, 2022 10:53
To: gmclist@list.gmcnet.org
Subject: [GMCnet] Re: Wiring diagram
Each and every one of them derived from my ~original scans at
https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.bdub.net%2Fwirediagrams%2F& ;data=05%7C01%7C%7Cba478ceddcce4c5319c808da286612a6%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637866716136430888%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC 4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=U7oD8TkH3yGHPIWUbsPZ1RHZJ7uA0FwFncsu%2Bh%2FehxM%3D&rese rved=0
You're very welcome
bdub
On Tue, Apr 26, 2022, 12:12 PM Hanson Email wrote:
> Does anyone have a wiring diagram for a 1976 23' Birchaven they can send
> me?
>
> Or direct me?
>
> TIA.
>
> Dean Hanson
>
> 1975 Avion.
>
> Fremont Ca.
>
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
_______________________________________________
GMCnet mailing list
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_______________________________________________
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1978 Transmode (403)
Pittsburgh, PA
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