bigbadchev84
1/2 ton status
this isnt specific as to what color wires do what..... anyone know? i got the pink/black=power, what do the other 4 go to?
The electrical wiring should be as follows:
*The tan wire running down the passenger side of the frame is the sending unit wire. On single tank trucks it plugs directly onto the sending unit. On dual tank trucks it plugs into a corresponding tan wire on the dual tank "extension harness".
*The dual tank "extension harness" has a tan/white stripe wire that plugs onto the passenger side tank sending unit. It has a light blue wire that plugs onto the driver side tank sending unit. And it has a light green wire that plugs onto the solenoid valve.
Those 4 wires (tan, tan/white stripe, light blue, and light green) all run up along the driver side frame rail and go through a plug/socket in the firewall. They connect to the in-dash switch as follows:
*Top left terminal on switch = light blue
*Top right terminal on switch = light green
*Middle left terminal = tan
*Middle right terminal = pink/black stripe (connects to fuse panel "IGN")
*Bottom left terminal = tan/white stripe
*Bottom right terminal = unused
The 3 lines from each tank sending unit are as follows:
Large 3/8" = main feed to fuel pump
Medium 5/16" = tank vent
Small 1/4" = return line from fuel pump
On trucks with heavy duty emissions equipment, the 5/16" lines just have little vent caps (like those found on a rearend) right near the tanks. But on trucks with the charcoal vapor canister(s), those lines run up to the canister(s).
The solenoid valve has a total of 6 fittings. There are two 3/8" inlet fittings that face back towards the tanks and one 3/8" outlet fitting that faces forward. The 3/8" outlet fitting goes to the 3/8" fuel line on the frame rail that leads up to the fuel pump. Each of the 3/8" inlet fittings goes to the 3/8" fitting on each of the fuel tank sending units.
Similarly, there are two 1/4" return line fittings on the back of the solenoid that connect to the corresponding tank 1/4" sending unit fittings. And the 1/4" fitting on the front of the solenoid valve goes to the 1/4" fuel return line on the frame rail that comes back from the fuel pump."
The electrical wiring should be as follows:
*The tan wire running down the passenger side of the frame is the sending unit wire. On single tank trucks it plugs directly onto the sending unit. On dual tank trucks it plugs into a corresponding tan wire on the dual tank "extension harness".
*The dual tank "extension harness" has a tan/white stripe wire that plugs onto the passenger side tank sending unit. It has a light blue wire that plugs onto the driver side tank sending unit. And it has a light green wire that plugs onto the solenoid valve.
Those 4 wires (tan, tan/white stripe, light blue, and light green) all run up along the driver side frame rail and go through a plug/socket in the firewall. They connect to the in-dash switch as follows:
*Top left terminal on switch = light blue
*Top right terminal on switch = light green
*Middle left terminal = tan
*Middle right terminal = pink/black stripe (connects to fuse panel "IGN")
*Bottom left terminal = tan/white stripe
*Bottom right terminal = unused
The 3 lines from each tank sending unit are as follows:
Large 3/8" = main feed to fuel pump
Medium 5/16" = tank vent
Small 1/4" = return line from fuel pump
On trucks with heavy duty emissions equipment, the 5/16" lines just have little vent caps (like those found on a rearend) right near the tanks. But on trucks with the charcoal vapor canister(s), those lines run up to the canister(s).
The solenoid valve has a total of 6 fittings. There are two 3/8" inlet fittings that face back towards the tanks and one 3/8" outlet fitting that faces forward. The 3/8" outlet fitting goes to the 3/8" fuel line on the frame rail that leads up to the fuel pump. Each of the 3/8" inlet fittings goes to the 3/8" fitting on each of the fuel tank sending units.
Similarly, there are two 1/4" return line fittings on the back of the solenoid that connect to the corresponding tank 1/4" sending unit fittings. And the 1/4" fitting on the front of the solenoid valve goes to the 1/4" fuel return line on the frame rail that comes back from the fuel pump."
