The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 11-15-2005, 01:06 PM   #1
LilGreg817
Registered User
 
Join Date: Nov 2005
Location: Mansfield,Tx
Posts: 3
Dual tank help

I have a '75 i put dual tanks on and need help wiring them up. I've got a 81-87 switch as follows pink, pink/black,green,limegreen wires and an 87 tank selector on the frame from a throttle body truck with pink/black,pink/white,pink,brown and grey wires. I'm not using the electric fuel pumps so does anyone know what i've got going on here and how to hook'em up?
LilGreg817 is offline   Reply With Quote
Old 11-15-2005, 02:20 PM   #2
boxrodz
Until Seventy Times Seven
 
boxrodz's Avatar
 
Join Date: Feb 2005
Location: Rocky Mountain Front Range
Posts: 1,301
Re: Dual tank help

I'll take a shot at it.

On the fuel tank selector valve:
Pink/Black = Right Tank Sending Unit.
Pink/White = Left Tank Sending Unit.
Pink = Tank Sending Unit wired to the bulkhead connector going to the Fuel Gauge.
Grey = Right Selector Switch (Lime Green Wire)
Brown = Left Selector Switch (Dark Green Wire)

On the fuel tank selector switch:
Pink = Ignition Power wired to Fuse Box
Pink/Black = Ground wired to Bus Bar

* You may have to check the (Pink/Black, Grey-Lime Green) and the (Pink/White, Brown-Dark Green) configurations to make sure the Selector switch in the 'Right' position switches the valve/sending unit to the 'Right' tank and in the 'Left' position switches the valve/sending unit to the 'Left' tank.

Good luck.
__________________
boxRODz
1983 C10 SWB Fleetside

When two halves is gone, there's nuthin left. Two nothings is nuthin. That's mathematics son.
You can argue with me but you can't argue with figures. Two half nothings is a whole nuthin...
boxrodz is offline   Reply With Quote
Old 11-17-2005, 03:07 PM   #3
LilGreg817
Registered User
 
Join Date: Nov 2005
Location: Mansfield,Tx
Posts: 3
Re: Dual tank help

Thanks Boxrodz, maybe this weekend i'll have a chance to finally wire em up...........been running off just the left tank for months.
LilGreg817 is offline   Reply With Quote
Old 02-22-2007, 10:16 PM   #4
alec22
Registered User
 
Join Date: Dec 2006
Location: Jacksonville, Fl
Posts: 12
Re: Dual tank help

Can anyone confirm these wire colors? My truck has the green colored wires clipped about half down the frame and there's also NO plug to plug in the valve. I've picked up a 6 port valve (I have an '85) and plug. It's currently running on one tank without a selector valve or cross over lines.

Also, the vapor canister has been removed and there is no return line from the carb. (aftermarket holley installed). Should I just block of the return line and vent lines? The gas caps are vented so they'll be a vent on the tanks.
alec22 is offline   Reply With Quote
Old 02-24-2007, 02:31 PM   #5
boxrodz
Until Seventy Times Seven
 
boxrodz's Avatar
 
Join Date: Feb 2005
Location: Rocky Mountain Front Range
Posts: 1,301
Re: Dual tank help

alec22-
Check your other post 'dual tank wiring' for a response.
__________________
boxRODz
1983 C10 SWB Fleetside

When two halves is gone, there's nuthin left. Two nothings is nuthin. That's mathematics son.
You can argue with me but you can't argue with figures. Two half nothings is a whole nuthin...
boxrodz is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 07:58 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com