Cold Blue Posted April 12, 2019 Report Share Posted April 12, 2019 Hey guys - just bought a new sending unit for my 48 Plymouth. Its a 2 wire sender, for the original gauge. Which way does the float go in the tank? Towards the front, the back, or side to side? Anybody know? I would think sideways, but I am guessing. And another question - it has two wires, which connect to the terminals on the sender, then to the terminals labeled "1" and "2" on the back of the gauge. The third terminal on the gauge is for power. How is the signal sent from the sender to the gauge if it doesn't have any power in the two wires from the sender??? Thanks! Quote Link to comment Share on other sites More sharing options...
Kahunah Posted April 13, 2019 Report Share Posted April 13, 2019 I'm pretty sure on my 41 the float was towards the left side of the car but its been awhile. I'm sure someone will correct me if I'm mistaken. The two wires at the sender are a path to ground. There is varying resistance on each circuit with the position of the float arm. That in turn actually heats metal strips in the gauge that moves the needle. 1 Quote Link to comment Share on other sites More sharing options...
soth122003 Posted April 13, 2019 Report Share Posted April 13, 2019 Kahunah is right. Float points to the left or filler hose on the tank. Joe Lee 1 Quote Link to comment Share on other sites More sharing options...
Cold Blue Posted April 13, 2019 Author Report Share Posted April 13, 2019 Thanks so much for the replies. But does anyone know about how to hook up a 2 wire sender when the terminals are not labeled? I am thinking this - install the sender with the float towards the filler hose. That will position the terminals to the rear and front of the car. Run one wire to the rearmost terminal to the post on the gauge labeled 2, on the driver's side. Run the other wire to the post labeled 1, on the passenger side. That wires the gauge so that the wires run parallel, if that makes any sense..... Quote Link to comment Share on other sites More sharing options...
Plymouthy Adams Posted April 13, 2019 Report Share Posted April 13, 2019 hook them up...if your gauge and sender functions they will read either correctly or worse case, reversed.....ie; empty is full and full is empty... Quote Link to comment Share on other sites More sharing options...
soth122003 Posted April 13, 2019 Report Share Posted April 13, 2019 Hey Cold Blue, Connect the wires before putting the sender in the tank. Put the float to down or empty and check the gage. If it reads other than empty reverse the wires and check again. Or put the float to full and check. Either way it is an easy fix. Then mark the terminals on the sender put it in the tank and hook it up. Joe Lee Quote Link to comment Share on other sites More sharing options...
Cold Blue Posted April 13, 2019 Author Report Share Posted April 13, 2019 47 minutes ago, soth122003 said: Hey Cold Blue, Connect the wires before putting the sender in the tank. Put the float to down or empty and check the gage. If it reads other than empty reverse the wires and check again. Or put the float to full and check. Either way it is an easy fix. Then mark the terminals on the sender put it in the tank and hook it up. Joe Lee Thanks Soth!! Yep, that would be an easy way to check the gauge reading to make sure you've got her hooked up right. Thanks so much!! Quote Link to comment Share on other sites More sharing options...
Jerry Roberts Posted April 14, 2019 Report Share Posted April 14, 2019 5 hours ago, soth122003 said: Hey Cold Blue, Connect the wires before putting the sender in the tank. Put the float to down or empty and check the gage. If it reads other than empty reverse the wires and check again. Or put the float to full and check. Either way it is an easy fix. Then mark the terminals on the sender put it in the tank and hook it up. Joe Lee When you do this be sure to run a ground wire to sender flange . Also your sender probably will go in the tank only in one position as the holes are not symetrical. Quote Link to comment Share on other sites More sharing options...
Cold Blue Posted April 14, 2019 Author Report Share Posted April 14, 2019 9 hours ago, Jerry Roberts said: When you do this be sure to run a ground wire to sender flange . Also your sender probably will go in the tank only in one position as the holes are not symetrical. Will do. Thank you! Quote Link to comment Share on other sites More sharing options...
woodrow Posted April 15, 2019 Report Share Posted April 15, 2019 hey. just curious where you bought your guage setup. mine is busted from the previous owner. Quote Link to comment Share on other sites More sharing options...
Cold Blue Posted April 15, 2019 Author Report Share Posted April 15, 2019 10 hours ago, woodrow said: hey. just curious where you bought your guage setup. mine is busted from the previous owner. I got my sender unit from MoparPro off Ebay. They had a "best offer" tab, and I gave them a much lower offer, and they accepted it. Looks like a nice unit, brand new, (repro of course). Haven't installed it yet. Gotta run a new wire from the gauge to the sender, as my car had a single wire aftermarket temporary gauge on it. My dash gauge looks fine, and I hope it works!!! Quote Link to comment Share on other sites More sharing options...
woodrow Posted April 16, 2019 Report Share Posted April 16, 2019 thx. I will have a look. update when u have it done if you can. I'd like to see.if it works out for you. good luck. 1 Quote Link to comment Share on other sites More sharing options...
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