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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-

Oil Pressure Sending Unit Connector

  • Thread starter Thread starter 93gtmustang
  • Start date Start date Nov 15, 2025

93gtmustang

10 Year Member
Oct 21, 2006
515
43
49
Nov 15, 2025
#1
  • Nov 15, 2025
  • #1
The connector I got from LMR keeps coming unhooked.
Has anyone used an electrical ring terminal and a couple nuts for the connection?
Also, should they be brass?
 

AeroCoupe

lube between the nut and the face. I know my lubes
Founding Member
Oct 28, 2001
5,854
3,985
183
Claremore, OK
Nov 15, 2025
#2
  • Nov 15, 2025
  • #2
I cut the one off the factory harness years ago. Crimped a ring terminal on the wire, put a flat washer on the sending unit, ring terminal, flat washer, lock washer, and then a brass nut. Never had an issue.
 
Reactions: rednotch and 93gtmustang

93gtmustang

10 Year Member
Oct 21, 2006
515
43
49
Nov 15, 2025
#3
  • Nov 15, 2025
  • #3
Are your washers, lock washer and ring terminal brass?
I have a steel ring terminal, 2- steel nuts. I have 2 brass nuts I can use also.
I believe the connection on the sending unit is brass?
Not sure if it's wrong mixing dissimilar metals?
Thanks!
 

93gtmustang

10 Year Member
Oct 21, 2006
515
43
49
Nov 15, 2025
#4
  • Nov 15, 2025
  • #4
AeroCoupe said:
I cut the one off the factory harness years ago. Crimped a ring terminal on the wire, put a flat washer on the sending unit, ring terminal, flat washer, lock washer, and then a brass nut. Never had an issue.
Click to expand...
Could you put up a pic?
 

93gtmustang

10 Year Member
Oct 21, 2006
515
43
49
Nov 15, 2025
#5
  • Nov 15, 2025
  • #5
This is what I have so far. I'm going to add the washers and lock washer.
 

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AeroCoupe

lube between the nut and the face. I know my lubes
Founding Member
Oct 28, 2001
5,854
3,985
183
Claremore, OK
Nov 15, 2025
#6
  • Nov 15, 2025
  • #6
Nope. Just regular washers and lock nut.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,249
17,931
224
Massachusetts
Nov 15, 2025
#7
  • Nov 15, 2025
  • #7
You might be able to give the LMR connector a squeeze in the right spot to help it grip better
 
Reactions: 93gtmustang

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
27,902
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203
polk county florida
Nov 15, 2025
#8
  • Nov 15, 2025
  • #8
Mustang5L5 said:
squeeze in the right spot to help it grip better
Click to expand...
Totally wasted CT material
 

rednotch

I'd like to remain having one chocolate starfish
Founding Member
Aug 14, 2000
1,387
621
143
south jersey
Nov 15, 2025
#9
  • Nov 15, 2025
  • #9
AeroCoupe said:
I cut the one off the factory harness years ago. Crimped a ring terminal on the wire, put a flat washer on the sending unit, ring terminal, flat washer, lock washer, and then a brass nut. Never had an issue.
Click to expand...
This except I use a ring terminal for the auto meter electric then the factory connector on top ofit if I want that to work, sending unit ohm range is the same for the canister style and 2241 autometer uses with the short sweep gauges.
 
Reactions: 93gtmustang

93gtmustang

10 Year Member
Oct 21, 2006
515
43
49
Nov 16, 2025
#10
  • Nov 16, 2025
  • #10
Mustang5L5 said:
You might be able to give the LMR connector a squeeze in the right spot to help it grip better
Click to expand...
Yes, I tried that a bunch of times, but it kept coming off after a while.
The problem with the LMR connector is that is too small. When you finally get it on, its already out of shape and won't stay on.
I was going to try this one to if it was any better. https://www.npdlink.com/product/repair-harness-oil-pressure-sending-unit-repro/201582
But now I'm going with the ring terminal set up. At least it will stay on.
Thanks!
 
Reactions: gkomo

rednotch

I'd like to remain having one chocolate starfish
Founding Member
Aug 14, 2000
1,387
621
143
south jersey
Nov 16, 2025
#11
  • Nov 16, 2025
  • #11
93gtmustang said:
Yes, I tried that a bunch of times, but it kept coming off after a while.
The problem with the LMR connector is that is too small. When you finally get it on, its already out of shape and won't stay on.
I was going to try this one to if it was any better. https://www.npdlink.com/product/repair-harness-oil-pressure-sending-unit-repro/201582
But now I'm going with the ring terminal set up. At least it will stay on.
Thanks!
Click to expand...
Your local parts stores should have them... Even Napa sells it for $6 and change.. ECH EC104
 
Reactions: 93gtmustang

93gtmustang

10 Year Member
Oct 21, 2006
515
43
49
Nov 16, 2025
#12
  • Nov 16, 2025
  • #12
rednotch said:
Your local parts stores should have them... Even Napa sells it for $6 and change.. ECH EC104
Click to expand...
Thanks for the link.
 

nickyb

I gotta say i never painted my nuts, Never Ever
15 Year Member
Apr 3, 2009
2,979
1,626
153
nevada
Nov 16, 2025
#13
  • Nov 16, 2025
  • #13
93gtmustang said:
Are your washers, lock washer and ring terminal brass?
I have a steel ring terminal, 2- steel nuts. I have 2 brass nuts I can use also.
I believe the connection on the sending unit is brass?
Not sure if it's wrong mixing dissimilar metals?
Thanks!
Click to expand...
Some CT material in there, like" I have 2 brass nuts I can use also."
 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor
Admin Dude
Jan 4, 1985
43,033
21,207
234
Box behind Walmart
Nov 16, 2025
#14
  • Nov 16, 2025
  • #14
Dielectric grease helps a lot.

You can also use blue loctite or even anti-seize between metals to slow galvanic corrosion.
 

Bullitt347

I have been doing it wrong this whole time
15 Year Member
Mar 23, 2007
3,960
2,919
194
Middle of Maine
Nov 16, 2025
#15
  • Nov 16, 2025
  • #15
Noobz347 said:
Dielectric grease helps a lot.
Click to expand...
Some people prefer the P Diddy baby oil...
 

AeroCoupe

lube between the nut and the face. I know my lubes
Founding Member
Oct 28, 2001
5,854
3,985
183
Claremore, OK
Nov 16, 2025
#16
  • Nov 16, 2025
  • #16
Or just use some dielectric grease?
 

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
27,902
10,555
203
polk county florida
Nov 17, 2025
#17
  • Nov 17, 2025
  • #17
93gtmustang said:
you finally get it on, its already out of shape
Click to expand...
Some rich CT material around here.
 
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