by vanner68 Fri Apr 03, 2015 8:04 amOr put a hitch back there....
+8
morbank
Vantasia
Joe Van
Big W
donivan65
chiliVANilli
vanny
Magic Potion
12 posters
1st gen fuel tank for chevy
vanner68- Number of posts : 655
Location : Eastpointe MI
Registration date : 2008-09-22
donivan65- Governor
- Number of posts : 12245
Location : San Diego, California
Registration date : 2008-05-12
the way the system works is 12 volts goes into the fuel gauge, through it, comes out the wire that connects to the sending unit,,,,,if you disconnect that wire and turn on the key, 12 volts runs through the gauge and pushes that needle past FULL,,,,,,,now if you touch that wire to the body, that stops the 12 volts and the gauge reads EMPTY,,,,,,thats not really how it works, but you get the idea of what you are looking for,,,,,,in reality, the sending unit is a variable resistor,,,,lets 30 ohms though so that limits the needle movement to the FULL mark, 15 for 1/2, and 0 ohms to drag the needle to EMPTY,,,,,so that 1st Gen gauge needs a sending unit that only has a limit of 0-30 ohms for it to be accurate,,,,a 2nd Gen gauge needs a 0-90 ohm sending unit,,,,,,,and all the other aftermarket and other models use all kinds of different values... but the gauge and sending unit have to match,,,,talk the same language so they understand each other,,,,,,,,so you exactly how much gas is in your tank,,,,,,,,
Magic Potion- Number of posts : 148
Location : Hastings Nebraska
Registration date : 2015-03-13
I bought a sender part # FG117A because it was easily modified to fit in my tank, it's a 0 to 90 ohm. So I tried adjusting it with the resister and potentiometer not really understand how it works thinking I could just follow the directions. I don't think I wired it correctly and I didn't have a high enough wattage on the resister or the potentiometer.
donivan65- Governor
- Number of posts : 12245
Location : San Diego, California
Registration date : 2008-05-12
so,,,you want to trick the 30 ohm gas gauge to accept a 90 ohm signal,,,,,,,can you print the directions here,,,,,,,,we just screw a 30 ohm pick up truck sender on our van pick up tube to make things work right again,,,,,,,
