| Tank Selector Switch [message #219161] |
Mon, 19 August 2013 20:01  |
Manong
Messages: 88
Registered: July 2007
Location: Madison, WI
Karma: 0
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This question has been bugging me since I installed my new dash several years ago. My tank switch is a style rocker switch. Since I removed it from the old dash, where it said which way was the main or aux tank, I no longer know which way is main or aux. Is there a way to determine which position, up or down, is the main and aux tank ??
Right now I don't know if I am on the main or if I am using the aux.
Manong
Madison, WI
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| Re: Tank Selector Switch [message #219168 is a reply to message #219161] |
Mon, 19 August 2013 20:20  |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Senior Member |
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Does your front have an accessible rubber hose where it feeds the solenoid switch? I would think if you put a hemostat on the hose and it still ran you would be on the rear ( the main) you could then flip to spare and it should die after a min. Or follow the color codes to the switch and meter it out
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: Tank Selector Switch [message #219173 is a reply to message #219161] |
Mon, 19 August 2013 20:42 |
zhagrieb
Messages: 676
Registered: August 2009
Location: Portland Oregon
Karma: 0
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Senior Member |
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Tom,
The switch has 5 terminals. The side with 3 terminals selects the fuel gage, the side with 2 activates the tank select solenoid valve. Use an ohm meter on the 2 terminal side to determine the open or no contact position. The switch is then in the main tank position.
Wires to that portion of the switch are pink with a double black stripe to the "middle" terminal, black to the corner one. For the fuel gage connections the wire to the terminal adjacent to the black wire would be tan with a double white stripe, to the other corner would be tan and to the middle probably both a light grey and a grey with double black stripe.
You'll find a schematic at:
http://www.bdub.net/wirediagrams/73-12vdc-engine.pdf
Glenn
Glenn Giere, Portland OR, K7GAG
'73 "Moby the Motorhome" 26'
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| Re: [GMCnet] Tank Selector Switch [message #219193 is a reply to message #219173] |
Mon, 19 August 2013 23:54 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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BTW the fact that there are two wires on one side and three on the other means if someone installed it up side down (switched to
MAIN actually turns on AUX and vice versa) you can't just remove the connector; turn it over, and reconnect it.
You have to remove the front dash panel and the rear dash panel to gain access to the switch itself to turn it over!
PITA!
Regards,
Rob "whose MAIN / AUX switch is upside down" M.
-----Original Message-----
From: Glenn Giere
Tom,
The switch has 5 terminals. The side with 3 terminals selects the fuel gage, the side with 2 activates the tank select solenoid
valve. Use an ohm meter on the 2 terminal side to determine the open or no contact position. The switch is then in the main tank
position.
Wires to that portion of the switch are pink with a double black stripe to the "middle" terminal, black to the corner one. For the
fuel gage connections the wire to the terminal adjacent to the black wire would be tan with a double white stripe, to the other
corner would be tan and to the middle probably both a light grey and a grey with double black stripe.
You'll find a schematic at:
http://www.bdub.net/wirediagrams/73-12vdc-engine.pdf
Glenn
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Tank Selector Switch [message #219229 is a reply to message #219193] |
Tue, 20 August 2013 10:02 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Senior Member |
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Rob,
Could you not switch the fuel inlets to the switch if your switch is upside down rather than pull the dash apart?
Todd Sullivan
Sully
77 royale
Seattle
On Aug 19, 2013, at 9:54 PM, "Rob Mueller" <robmueller@iinet.net.au> wrote:
> BTW the fact that there are two wires on one side and three on the other means if someone installed it up side down (switched to
> MAIN actually turns on AUX and vice versa) you can't just remove the connector; turn it over, and reconnect it.
>
> You have to remove the front dash panel and the rear dash panel to gain access to the switch itself to turn it over!
>
> PITA!
>
> Regards,
> Rob "whose MAIN / AUX switch is upside down" M.
>
> -----Original Message-----
> From: Glenn Giere
>
> Tom,
>
> The switch has 5 terminals. The side with 3 terminals selects the fuel gage, the side with 2 activates the tank select solenoid
> valve. Use an ohm meter on the 2 terminal side to determine the open or no contact position. The switch is then in the main tank
> position.
>
> Wires to that portion of the switch are pink with a double black stripe to the "middle" terminal, black to the corner one. For the
> fuel gage connections the wire to the terminal adjacent to the black wire would be tan with a double white stripe, to the other
> corner would be tan and to the middle probably both a light grey and a grey with double black stripe.
>
> You'll find a schematic at:
> http://www.bdub.net/wirediagrams/73-12vdc-engine.pdf
>
> Glenn
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
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Unsubscribe or Change List Options:
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: [GMCnet] Tank Selector Switch [message #219230 is a reply to message #219193] |
Tue, 20 August 2013 10:05 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Senior Member |
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I mean to the fuel selector valve.
Todd Sullivan
Sully
77 royale
Seattle
On Aug 19, 2013, at 9:54 PM, "Rob Mueller" <robmueller@iinet.net.au> wrote:
> BTW the fact that there are two wires on one side and three on the other means if someone installed it up side down (switched to
> MAIN actually turns on AUX and vice versa) you can't just remove the connector; turn it over, and reconnect it.
>
> You have to remove the front dash panel and the rear dash panel to gain access to the switch itself to turn it over!
>
> PITA!
>
> Regards,
> Rob "whose MAIN / AUX switch is upside down" M.
>
> -----Original Message-----
> From: Glenn Giere
>
> Tom,
>
> The switch has 5 terminals. The side with 3 terminals selects the fuel gage, the side with 2 activates the tank select solenoid
> valve. Use an ohm meter on the 2 terminal side to determine the open or no contact position. The switch is then in the main tank
> position.
>
> Wires to that portion of the switch are pink with a double black stripe to the "middle" terminal, black to the corner one. For the
> fuel gage connections the wire to the terminal adjacent to the black wire would be tan with a double white stripe, to the other
> corner would be tan and to the middle probably both a light grey and a grey with double black stripe.
>
> You'll find a schematic at:
> http://www.bdub.net/wirediagrams/73-12vdc-engine.pdf
>
> Glenn
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
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Unsubscribe or Change List Options:
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: [GMCnet] Tank Selector Switch [message #219238 is a reply to message #219229] |
Tue, 20 August 2013 10:31 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Sully,
Yes that would be possible, however, the selector valve is normally not powered when you switch to AUX it is powered and you get gas
from the AUX tank.
Because the switch was upside down and MAIN was really AUX it was powered always. This caused the instrument fuse to blow
intermittently and I'd loose instruments. The intermittent fuse blowing became constant when the selector valve finally died. I
have reversed the labels on the switch
Since fuel transfers back and forth between the tanks the AUX position is normally only used when you get real low on gas and
usually you stop to fill up. .
Regards,
Rob M.
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Todd Sullivan
Sent: Tuesday, August 20, 2013 10:02 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Tank Selector Switch
Rob,
Could you not switch the fuel inlets to the switch if your switch is upside down rather than pull the dash apart?
Todd Sullivan
Sully
77 royale
Seattle
On Aug 19, 2013, at 9:54 PM, "Rob Mueller" <robmueller@iinet.net.au> wrote:
> BTW the fact that there are two wires on one side and three on the other means if someone installed it up side down (switched to
> MAIN actually turns on AUX and vice versa) you can't just remove the connector; turn it over, and reconnect it.
>
> You have to remove the front dash panel and the rear dash panel to gain access to the switch itself to turn it over!
>
> PITA!
>
> Regards,
> Rob "whose MAIN / AUX switch is upside down" M.
>
> -----Original Message-----
> From: Glenn Giere
>
> Tom,
>
> The switch has 5 terminals. The side with 3 terminals selects the fuel gage, the side with 2 activates the tank select solenoid
> valve. Use an ohm meter on the 2 terminal side to determine the open or no contact position. The switch is then in the main tank
> position.
>
> Wires to that portion of the switch are pink with a double black stripe to the "middle" terminal, black to the corner one. For
the
> fuel gage connections the wire to the terminal adjacent to the black wire would be tan with a double white stripe, to the other
> corner would be tan and to the middle probably both a light grey and a grey with double black stripe.
>
> You'll find a schematic at:
> http://www.bdub.net/wirediagrams/73-12vdc-engine.pdf
>
> Glenn
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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