Re: Finding an Off the Shelf Gas Tank Fuel Sender for 47 Packard
Posted by HH56 On 2017/3/27 21:10:00
Quote:
Here is a schematic of the gauge and sender as a unit. Basically what happens is with the wire to the resistance unit open there is no current flow thru the series coil. With nothing to balance the pull of the potential coil, the needle is moved off scale past the working range.
Attach file:
(119.36 KB)
I have run into one problem, if you break the circuit ( wire comes off or you disconnect the power) then Empty does not read correct. This has something to do with the gauge. It also happened with the Packard Sending Unit. The needle will go way pass Empty ( Needle on left hand side of the Dot). but once you drive the gauge back up then Empty reads correct. So I'm looking into running some test and see what happens.
Here is a schematic of the gauge and sender as a unit. Basically what happens is with the wire to the resistance unit open there is no current flow thru the series coil. With nothing to balance the pull of the potential coil, the needle is moved off scale past the working range.
Attach file:
(119.36 KB)
This Post was from: https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=189695