This is my first post, but have been reading for a while. Moving from a 97 F-250 with the 7.3 to a 08 3500 dually. Just got it home a week ago today and have the 5th wheel TrailerSaver hitch installed, the TruContol brake controller installed and a few more things done to make it mine. Now I’m about ready to put my 100 gal fuel tank in the bed. I like to plumb them into the fuel system so I can just flip the switch to select which fuel tank I want. I use a Pollak 42-159 selector valve for this. So the question is, can someone tell me which wire is the sender wire in that bundle along the left frame? It would also be helpful to know on the fuel lines which one is the return line to the tank and which is from the tank to the engine. Thanks for the help.

 

Don't have a clue on your question; try http://www.rv.net or http://www.towrig.com.

Welcome to the forums!

 

Don't think so. The stock tank has a internal lift pump for supplying fuel to the CP3 injection pump. Your best bet is to have a control valve and gravity feed from the aux tank to the stock tank.
For the wiring you can download the schematics from the dodge body builder site. http://www.dodge.com/bodybuilder/

And welcome to the DTR!

MikeyB

 

Thanks for the link to the diagrams, I've been looking but didn't find that. I'll add that to my favorites. I guess coming from the PowerStroke side I figured that the CTD would have the fuel pump on the engine as well. Must be just the high presure pump on the engine. So does anybody know how much presure is needed on that line? I don't really like the idea of gravity feed to the main tank. It is really nice to have a simple switch to select with tank you want, which also switches the fuel gage so it reads the tank you are drawing from. Looks like I need to find more information on this. thanks for the help.