Hi, new to the forum. Hopefully I'm following your guy's guidelines without needing to delete or move this forum. Any who, I had bought this dodge ram 1500 truck and the fuel gauge doesn't work. From what I've read that it can be in three areas in which are Fuel, cluster, and/or ground.

I had bought a new fuel module for it and didn't work. Had challenges to return the pump (one in a half weeks and personal matters) and swap it for a new and still the same, thinking it was one out of 10 chances that got a dud one outta nowhere.

Moved onward to cluster. Had went to the junkyard bought a cluster and swap out the cluster to see it'll be that. Nope. Still doesn't read the fuel gauge. Furthermore, done the cluster reset to see it'll help from the truck being off, hold the trip meter button for 5 seconds, put the switch to on, then getting "chec", no longer holding, let it do its thing. turn it on when everything finished and still reads empty when knowing that it has at least 9 gallons of fuel in the tank. Returned the cluster and put the original cluster it had.

Went to find a 3.9 harness that is half of what it is due to connection it is that it meets half way or where it's near the driver side wheel (with a red lock pin). Had swapped that part out since the original was bad that the previous owner done some damage to the 02 sensor connections. all that in good and working condition from what I believe and didn't fix the issue (does have better rpm or response to gas paddle than the previous harness I'm referring to). Have a ground tester that connects to the battery and from touching any place of its reach it'll light up. tested the grounds and cleaned few due to dust from living in phoenix, az. And can't find any corrosion or any wires that are bad or loose.

Not sure what or where I'm missing to see whether it could be cluster or ground issue at this rate since the fuel module/pump is new. May someone help or guide me to potentially fix this error. Not sure if I'm gonna need to disassemble the dashboard area to see if theirs any ground that might be hidden that is causing this issue from their? Or any steps I might've missed in any of the 3 areas. Had checked the fuses as well and all are fine. Not a tech guy. Putting it out there that not sure how to use the multimeter to test anything. But, willing to give it a shot on how to use which I do believe is simple, but haven't used one or multiple times. At the same time where or what part to put the multimeter in action to know what I'm looking for. Thank you in advance, looking forward to any feedback, and will respond efficiently as I can from not only from hearing (or reading) the feedback, put it into action and giving it whether it works or didn't and giving my experience and feedback to tackle the next area if it wasn't X factor.

 

Grab the service manual for your truck from here. Wiring diagrams are in section 8W. Verify you are getting voltage back to the pump for the gauge.

 

I know since fuel pumps you have to assemble the float. Did you make sure it was clicked in?

 

Yes, ensured it not only clicked, also made sure that the lock pin it came with is secured as well that it won't come off loose easily when installed back to the fuel tank.

 

The good manual that people hardly use (I'm guilty as well on this since youtube) Thank you for letting me know as well in which section to look at HeyYou. I'll respond back with any questions in particular. I'll add pictures if it comes down to not knowing what it is or x factor.