| jc4 vacuum pump wiring [message #319886] |
Sun, 02 July 2017 09:51  |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
|
Senior Member |
|
|
Ok,
just wanting a little clarification:
NC = no connection????
I see in the power point, there are 3 wires off the molex connection, however, it is circled "4 wires used".
the diagrams show 4 items:
12+
NC
ACC
GND.
the NC in the pin out diagram says it is a ground on the pump.
I only have 3 pins that came with the connector.
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
|
|
|
|
| Re: [GMCnet] jc4 vacuum pump wiring [message #319888 is a reply to message #319886] |
Sun, 02 July 2017 11:31  |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
|
Senior Member |
|
|
Jon
NC is usually associated with relays or switches and means Normally Closed.
I haven’t seen your diagram though.
Emery Stora
77 Kingsley
Frederick, CO
> On Jul 2, 2017, at 8:51 AM, Jon Roche wrote:
>
> Ok,
>
> just wanting a little clarification:
>
> NC = no connection????
>
> I see in the power point, there are 3 wires off the molex connection, however, it is circled "4 wires used".
>
> the diagrams show 4 items:
>
> 12+
> NC
> ACC
> GND.
>
> the NC in the pin out diagram says it is a ground on the pump.
>
>
> I only have 3 pins that came with the connector.
>
>
> --
> Jon Roche
> 75 palm beach
> St. Cloud, MN
> http://lqqkatjon.blogspot.com/
>
> _______________________________________________
> 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
|
|
|
|
| Re: [GMCnet] jc4 vacuum pump wiring [message #319889 is a reply to message #319886] |
Sun, 02 July 2017 11:58 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
Jon,
This should clarify 'most anything about the JC-4:
http://www.gmcmhphotos.com/photos/g4896-vacuum-booster-pump-auxiliary-gmc-jc4.html
Ken H.
On Sun, Jul 2, 2017 at 10:51 AM, Jon Roche wrote:
> Ok,
>
> just wanting a little clarification:
>
> NC = no connection????
>
> I see in the power point, there are 3 wires off the molex connection,
> however, it is circled "4 wires used".
>
> the diagrams show 4 items:
>
> 12+
> NC
> ACC
> GND.
>
> the NC in the pin out diagram says it is a ground on the pump.
>
>
> I only have 3 pins that came with the connector.
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
|
|
|
|
| Re: jc4 vacuum pump wiring [message #319894 is a reply to message #319886] |
Sun, 02 July 2017 17:38 |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
|
Senior Member |
|
|
The slideshow and other info on gmcmhphotos is where my question derives.
http://www.gmcmhphotos.com/photos/vacuum-booster-pump-auxiliary-gmc-jc4/p24283-jc4-pump.html
Position C. Says NC
Right- usually normally closed.
The oem connector and pump only came with 3 pins to connect wires. And the slide showing the molex has only 3 wires.
So i am guessing that c position that is indicated as ground on the pump pinout is not needed. (Have pin A as ground)
???
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
|
|
|
|
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
