Pink wires - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rayfinseats · 06-06-2011, 12:54 AM

83 chevy carbureted. Dual gas tanks. Wiring from scratch. Almost finished. How do I connect the fuel gauge to the dual tanks? I think it has something to do with the pink wires. I don't understand. I am technical I just can't get my head around how it's wired with the selector switch. Does the sender work on resistance? How do the wires hook to the selector valve?

James McClure · 06-06-2011, 09:58 AM

Ray, this is not as complicated as it appears to you. Your right in that it's the pink wires. Forget about the dash switch, it dosen't directly change which tank is being read, BUT, it is responsible for the position of the selector valve under the truck which is responsible for which tank is being read. The dash wire (from the guage) goes to the selector valve. There are 2 more wires that go to either tank sending unit from the valve. When either tank is selected, the valve connects that sender to the dash wire. The selector acts like a single pole double throw switch. Each tank sending unit is a variable resistor, values are O ohms for full and 92 for empty. These values may change but only by a little. Hope this helps, jim

rayfinseats · 06-06-2011, 07:42 PM

Yes that helps alot. Now I understand. Thank you so much.

06-06-2011, 12:54 AM	#1
rayfinseats Registered User Join Date: Dec 2010 Location: sioux city, iowa Posts: 619	Pink wires 83 chevy carbureted. Dual gas tanks. Wiring from scratch. Almost finished. How do I connect the fuel gauge to the dual tanks? I think it has something to do with the pink wires. I don't understand. I am technical I just can't get my head around how it's wired with the selector switch. Does the sender work on resistance? How do the wires hook to the selector valve? Last edited by rayfinseats; 06-06-2011 at 01:04 AM.

06-06-2011, 09:58 AM	#2
James McClure One shot, one kill. Join Date: Dec 2007 Location: Saratoga Springs NY Posts: 859	Re: Pink wires Ray, this is not as complicated as it appears to you. Your right in that it's the pink wires. Forget about the dash switch, it dosen't directly change which tank is being read, BUT, it is responsible for the position of the selector valve under the truck which is responsible for which tank is being read. The dash wire (from the guage) goes to the selector valve. There are 2 more wires that go to either tank sending unit from the valve. When either tank is selected, the valve connects that sender to the dash wire. The selector acts like a single pole double throw switch. Each tank sending unit is a variable resistor, values are O ohms for full and 92 for empty. These values may change but only by a little. Hope this helps, jim __________________ 1984 K20 350M engine with 465,000 miles. Well, it's finally done!! Almost 2 years of work, but it was really worth the effort. Little stuff left to do is mount winch, wet sand & buff out and build belly pan\running boards. Body work takes lots and LOTS of beer!!!! God, Guts and Guns made America and God, Guts and Guns will preserve it! The worst thing you could do is get into my sights, but that don't matter, you'll never know it, cause you'll never hear the shotJim or Paladin whichever you choose.

06-06-2011, 07:42 PM	#3
rayfinseats Registered User Join Date: Dec 2010 Location: sioux city, iowa Posts: 619	Re: Pink wires Yes that helps alot. Now I understand. Thank you so much.



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