Atcmcc

Two things. @Chris O. one, this truck did have the retrofit but it has since been removed and replaced with a fass fuel system. Also this is a pic of the y harness coming off of the fass pump and plugs directly into the top of the tank,so that would be why it's different colors. I should have taken a pic of the harness coming directly from the truck. I will do that and post here, sorry for my oversight.

Do you guys know off hand which of the wires is the ground for the sending unit. At the top of the tank the connector has a red and two greens. I would like to jump the ground directly to the frame and see what happens, but I don't wanna do the wrong one?

Only one corroded ground so far, ( driver battery ground) my truck only has 83,000 on it now, it's the cleanest 2nd gen I've seen, especially living out here in md where everything is rusted to hell!

Nope, gauge is still dead but the ccd on the overhead went away. Still no "dte" either. Im still making my way through jags list of suggestions on the grounds and plugs, knocked a few of them out today at lunch.

That last post was probably extremely helpful, but not for my pea brain?. Btw, tightening down the connector in the PDC seems to have removed the "ccd" error, I had it come on everyday for the past week multiple times and for 10 mins at a time. After tightening down that connector I have driven to straight days and haven't seen that error. So kudos for that suggestion!??

Ok jag I'll start knocking things off that list, and I'll check the main pcm plug also. I unplugged the three connections at the the pcm and cleaned them, and I cleaned the harness under the wheel well, all looked clean anyhow but I did them anyway.

Yes sir

Ok guys, newest development. My overhead display quit giving me a " distance till empty" reading, it's just says "SC" now. I've still got mileage and odometer and the rest of the stuff but not that. That reveal anything new?

Ok guys, thanks so much for the help, I will get after taking a look at the wiring for the gauge cluster or try to rig up my own gauge as a test sometime during this week. Thanks for the compliment jag! Btw do you guys think that the overhead display flashing "ccd" at me every once in awhile could have anything to do with it? It seems to be doing it more frequently lately, but like I said before it has done it since I've owned the truck and the fuel gauge problem is a recent issue.

But the gauge test works, it reads quarter,half,three quarter, full.

New development, if I unplug the pcm harness closest to the passenger fender I get a full reading for the typical 10 minutes and then straight back to empty. Same thing happens if I reflash the ECM with a smarty ( the truck doesn't have any smarty programming I just used my brothers to try the reflash

Correct, however the the gauge only reads full after unplugging the batteries, the gauge check takes it through the parameters but it immediately reverts to empty when that test is finished. Kick panel ground looks good

Yes The overhead display reads correctly, it's what's been keeping me from running out of gas this long!?. And yeah the float isn't stuck on the side of the tank, I hooked up everything outside of the tank first and it never worked correctly even then. I just had to put it all back together becUse I needed he truck back that weekend and I have no concern of any of the parts inside the tank being the culprit since every single piece is brands new. Haha it's ok moparman, we all miss things Once in awhile?? Oh and yes the new float had resistance on the voltmeter and it changed as I moved the float. Every now and then the overhead display reads "ccd" for a minute or so and then fixes it's self, but this is something it has done for years.

I will do the test and get back to you, but I tried plugging in another brand new fuel level sending unit that I had when the tank was out and that one didn't do anything either

Hi, I have a 2001 dodge 3500 Cummins diesel.I have a dead fuel gauge issue that doesn't seem quite like the others that I have researched,so I could use some help. It reads empty at all times, UNLESS I unplug the batteries for 15-20 minutes and let the truck reset. At this time the fuel gauge will read full for about 15 mins, before it slowly drops to empty again and stays there permenantly. Here is what I have done. I have dropped the tank and I have replaced the entire canister/float/fuel level sending unit. I used an volt meter on the new sending unit and as I moved the float up and down I watched the resistance change. I have done the gauge test and watched the gauge move through its full range of motion. I have also looked at the wiring harness underneath the front driver wheel well where the wires are exposed before they enter the harness, and the wires above the fuel tank to look for any breaks in the connection. I have a fass fuel pump and fuel pressure gauge and everthing reads normal as far as that is concerned. Any ideas? Thanks for your time.