Author Topic: sending unit ground strap  (Read 1495 times)

Offline burdar

  • Sr. Resident
  • ******
  • Posts: 5925
sending unit ground strap
« on: April 13, 2012 - 02:20:46 PM »
Is the ground strap absolutley nessesary?  I already have continuity from the sender to the fuel line...I checked.  The sender grounds through the tank and straps.  Was the factory ground strap just a backup ground? 

Originally, I tried to use a 4" strap.  I bent the line closer to the sender then it was originally but still couldn't get the 4" to work.  Wade said his original strap was 7.5" long.  The repops are 8".  I don't know what changed back there but 8" will be way too long.  Since I have continuity, can I just go without one?

 




Offline MEK-Dangerfield

  • C-C.com Expert
  • ********
  • Posts: 20946
  • I don't get NO respect! Member since 1/25/2002
Re: sending unit ground strap
« Reply #1 on: April 13, 2012 - 03:44:05 PM »
Darren,

  You fuel sender unit should NOT be shorted to ground thru your tank. When the rubber gasket on the outside of the sender is used, this isolates the sender from ground. So the pick-up tube is not grounded until you install the ground strap.

Mike

1970 Challenger - SOLD
2016 SXT+.  1 of 524 SXT+'s in Plumb-crazy for 2016.

Offline Katfish

  • Resident
  • *****
  • Posts: 3733
  • 70 Challenger
Re: sending unit ground strap
« Reply #2 on: April 13, 2012 - 03:59:25 PM »
If you have ground it should work.  I would think the metal collar would hit both the tank and fuel sender.

Doesn't the gasket go under the sender?
« Last Edit: April 13, 2012 - 04:01:20 PM by Katfish »

Offline burdar

  • Sr. Resident
  • ******
  • Posts: 5925
Re: sending unit ground strap
« Reply #3 on: April 13, 2012 - 04:35:19 PM »
The lock ring touches the sender and the tank.  The post that the sender wire attaches to is insulated from the sender body.  I originally thought something was wrong too.

Offline MEK-Dangerfield

  • C-C.com Expert
  • ********
  • Posts: 20946
  • I don't get NO respect! Member since 1/25/2002
Re: sending unit ground strap
« Reply #4 on: April 13, 2012 - 04:36:38 PM »


Doesn't the gasket go under the sender?

Precisely, so the sender should be isolated from the grounding of the gas tank.

If you proceed, your fuel gauge will read full at all times.

Mike

1970 Challenger - SOLD
2016 SXT+.  1 of 524 SXT+'s in Plumb-crazy for 2016.

Offline burdar

  • Sr. Resident
  • ******
  • Posts: 5925
Re: sending unit ground strap
« Reply #5 on: April 13, 2012 - 04:38:18 PM »
The gasket goes between the sending unit and the tank...the locking ring still touches the tank and the sending unit.  :clueless: