Gas tank sender unit resistance

...was going to title this thread "When eBay goods go bad"
Been having problems with a couple of items bought off eBay a while ago. First up my new speedo cable tied itself in knots - ended up re-installing my original damaged case unit - works fine, just looks a bit rough.

Now my gas tank sender unit has given me incorrect information whilst out in the middle of nowhere

Question: can anyone who has one or recently used/bought one please give me the measurements of resistance "full + empty" of the sender unit please. I bought the unit from the big seller on eBay who has these occasionally, but can't remember his name to pose a question on an auction.

help appreciated...as I plan to buy an aftermarket gauge, but need the resistance values to pick the correct unit.

Thanks

Yahoo Group's GOERGE!!'s sending unit is a slightly modified (bent) A-Body unit. It read Full=11 ohms and Empty=73 ohms

If you use a Digital multi meter you really can't read the voltage to ground due to the points style voltage limiter. An analog meter is the way to go.

btw - A little ATF in the speedo cable may help you out in the future. I still have to install my Rockauto.com cable.

itruns wrote:Yahoo Group's GOERGE!!'s sending unit is a slightly modified (bent) A-Body unit. It read Full=11 ohms and Empty=73 ohms

If you use a Digital multi meter you really can't read the voltage to ground due to the points style voltage limiter. An analog meter is the way to go.

btw - A little ATF in the speedo cable may help you out in the future. I still have to install my Rockauto.com cable.

Thanks for the reply - I found the seller 'vansautollc' and the resistance is 10-75 ohms. Now I just need some clever components to make a gauge work

kiwimopar wrote:

itruns wrote:Yahoo Group's GOERGE!!'s sending unit is a slightly modified (bent) A-Body unit. It read Full=11 ohms and Empty=73 ohms

If you use a Digital multi meter you really can't read the voltage to ground due to the points style voltage limiter. An analog meter is the way to go.

btw - A little ATF in the speedo cable may help you out in the future. I still have to install my Rockauto.com cable.

Thanks for the reply - I found the seller 'vansautollc' and the resistance is 10-75 ohms. Now I just need some clever components to make a gauge work

Two flashlight batteries placed end to end (3 volts) moves a good
gauge up to about halfway. Three batteries push it to about 100
percent. The terminals on the back of the gas gauge are marked "A,"
"S," and "I." Test it with the "I" and "S" terminals.

"Mike" at D&M restorations can bypass/remove the stock
limiter and repair the fuel gauge part if needed.
website is:
http://www.dandmrestoration.com/contact

also, my "ebay" tank float reads about 5 gallons low. i.e. 10 gallons of gas = 1/4 tank, 15 gallons will push it to 3/4 tank, 20 will top it off. I just keep more than 1/4 tank in it all the time

Also, most aftermarket gauges have a resistance sweep similar to a GM, not a Mopar. If you plan on going aftermarket, figure out what you want and go from there.

http://www.aa1car.com/library/fuel_gauge_diagnosis.htm