The CJ3A Page CJ3B.info

Author Topic: Fuel sending unit  (Read 2423 times)

0 Members and 1 Guest are viewing this topic.

Offline Adam

  • Project Jeep (Newbie)
  • *
  • Posts: 8
  • Karma: +0/-0
  • '49 Willys CJ3A with 4.3l vortec V6 T.B.I.,
    • View Profile
Fuel sending unit
« on: July 26, 2013, 03:26:07 PM »
Can anyone tell me what gauge wires are used for the fuel gauge and sending unit, also the how its wired up. The wires were missing when i purchased my 3a. Thanks for any help and for taking the time

Offline garage gnome

  • Flatfender Master
  • *****
  • Posts: 1947
  • Karma: +0/-0
  • Rustologist
    • View Profile
Re: Fuel sending unit
« Reply #1 on: July 26, 2013, 06:55:13 PM »
The wire should be 14 gauge and the terminals should b marked, but I'll look at mine to be sure.
Nate in Western MA 1953 3A #3268, The Jalopy, '47 2A Wheelin' rig, '49 3A, #37071, unmolested, bone stock named Ted

Offline stony

  • Willys Guru
  • ****
  • Posts: 298
  • Karma: +0/-0
    • View Profile
Re: Fuel sending unit
« Reply #2 on: July 26, 2013, 06:57:39 PM »
Looks like it is pretty simple� One a single wire from the terminal on the sender to the fuel gauge.� The other side of the gauge to the ignition switch.� �Not sure on the original wire size, but it should only carry a very small current.
« Last Edit: July 26, 2013, 07:04:30 PM by stonyloam »
Terry
1949 CJ3A 11159 body 11225 engine 11140
On preservation vs. restoration:Roscoe Lee Brown "the Cowboys" when he met the whores on the trail:"Well, I have the inclination, but not the time”.

Offline Adam

  • Project Jeep (Newbie)
  • *
  • Posts: 8
  • Karma: +0/-0
  • '49 Willys CJ3A with 4.3l vortec V6 T.B.I.,
    • View Profile
Re: Fuel sending unit
« Reply #3 on: July 26, 2013, 07:42:15 PM »
Thanks that helps out alot  :)

Offline gmcjr

  • Flatfender Enthusiast
  • ***
  • Posts: 168
  • Karma: +0/-0
  • Even a blind hog finds a acorn every now and then.
    • View Profile
Re: Fuel sending unit
« Reply #4 on: July 26, 2013, 09:26:34 PM »
The + terminal of the fuel gauge goes to a switched power source, the - terminal goes the terminal on the sender unit. It is important that the mounting flange of the sender is good and grounded to tank, (It's usually through the mounting screws or a staple in the flange gasket) and the tank is good and grounded to the body or chassis. 16 AWG wire is sufficient, the current draw is minimal, but like GG said 14 would probably be better due to being more resistant to damage. That being said my dog chewed the wire going to to sender unit in two last week!� [smiley=angry.gif]
Hope this helps!
« Last Edit: July 26, 2013, 09:34:26 PM by gmcjr »
Gary in N. Texas
51 CJ-3A (old Trusty)
52 Ford 8n (ugly duckling)
46Farmall B (old Rusty)
18 Wrangler Jk