Adding a dual tank?
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Senior User
Joined: Nov 2001
Posts: 444
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From: Cleveland
Adding a dual tank?
Hello-
I have searched the old posts and did not get a clear answer on what I need.
I want to add a dual tank to my '78 F350 crew cab. I have a bed from another truck with the dual doors and the stock switch for the dash next to the heater-a/c controls.
1. Is the wiring already existent behind the heater control? All I have to do is plug my switch in?
2. If I obtain a factory Ford solenoid that mounts on the frame is all of the wiring there to both switch the tank and read the gauge? I understand i will have to run some new gas lines to it.
Thanks for the help!
I have searched the old posts and did not get a clear answer on what I need.
I want to add a dual tank to my '78 F350 crew cab. I have a bed from another truck with the dual doors and the stock switch for the dash next to the heater-a/c controls.
1. Is the wiring already existent behind the heater control? All I have to do is plug my switch in?
2. If I obtain a factory Ford solenoid that mounts on the frame is all of the wiring there to both switch the tank and read the gauge? I understand i will have to run some new gas lines to it.
Thanks for the help!
Lead Driver
Joined: Mar 2004
Posts: 8,922
Likes: 152
1. There isn't any plug in for the switch. You would have to find a truck that had duals and get the wiring from it.
2. Yes, the switch wire is there & the sender wire in the rear harness but you will need the short adapter wires to plug in from the harness to the sender & the one for the switching valve.
The fuel lines are pretty simple to hook up. Front tank is main, rear is auxillary. The switching valves only come in 5/16" now I was told at the dealer, last one I bought 4 years ago but it did clamp down and has never leaked.
2. Yes, the switch wire is there & the sender wire in the rear harness but you will need the short adapter wires to plug in from the harness to the sender & the one for the switching valve.
The fuel lines are pretty simple to hook up. Front tank is main, rear is auxillary. The switching valves only come in 5/16" now I was told at the dealer, last one I bought 4 years ago but it did clamp down and has never leaked.
Freshman User
Joined: Jun 2009
Posts: 37
Likes: 0
From: Ava, Missouri
I may be remembering incorrectly but isn't the front tank the aux and the rear the main? At least normally isn't it set up that way?
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