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

1984 Mustang Windshield Washer question

  • Thread starter Thread starter mercury-man
  • Start date Start date May 9, 2022
  • 1
  • 2
Next
1 of 2 Next Last
M

mercury-man

Member
Mar 17, 2022
47
24
18
Texas
May 9, 2022
#1
  • May 9, 2022
  • #1
The wiring harness from my windshield washer pump is disconnected.

I find another harness in close proximity that is also dis-connected.

However, both harnesses are female (see pictures).

Am I missing a connector piece?

 

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
27,899
10,554
203
polk county florida
May 9, 2022
#2
  • May 9, 2022
  • #2
The wires are different colors? If yes then one has nothing to do with the other.
 
M

mercury-man

Member
Mar 17, 2022
47
24
18
Texas
May 10, 2022
#3
  • May 10, 2022
  • #3
Thanks, The wires on the two connectors do look different.

Where should the washer pump harness connect?
 

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
27,899
10,554
203
polk county florida
May 10, 2022
#4
  • May 10, 2022
  • #4
Are these the wires from the washer pump?
 
M

mercury-man

Member
Mar 17, 2022
47
24
18
Texas
May 10, 2022
#5
  • May 10, 2022
  • #5
One set of the wires is from the washer pump. The other set comes from some wires that run toward the firewall.
 

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
27,899
10,554
203
polk county florida
May 10, 2022
#6
  • May 10, 2022
  • #6
I did a quick search and didn't find anything but didn't have much time to deal with it, without a wire diagram I would match wire colors on the plugs to wires on the wiper motor, or maybe use a test light to see if one of the plugs lights up when the washer button is pushed.
I'm not that familiar with the earlier models, when I get some more time this afternoon I can do more searching.
where is the washer tank on the 84 model?
 
M

mercury-man

Member
Mar 17, 2022
47
24
18
Texas
May 10, 2022
#7
  • May 10, 2022
  • #7
Here is a picture of my engine compartment with the washer tank circled. Tank is on left apron.

 
M

mercury-man

Member
Mar 17, 2022
47
24
18
Texas
May 10, 2022
#8
  • May 10, 2022
  • #8
General karthief said:
Are these the wires from the washer pump?
Click to expand...
Harness from washer reservoir is circled:
 

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
27,899
10,554
203
polk county florida
May 10, 2022
#9
  • May 10, 2022
  • #9
Does the washer pump work?
 
M

mercury-man

Member
Mar 17, 2022
47
24
18
Texas
May 10, 2022
#10
  • May 10, 2022
  • #10
No, the washer pump wiring isn't connected to anything.

It would be helpful to see a picture of how the washer wiring harness is connected on a similar Mustang that has a working washer pump..

So far, I have been unable to find a picture of a similar washer pump that has its wiring harness properly connected.
 

limp

wrap a little cheese around it and its a done
5 Year Member
Oct 4, 2020
5,465
2,898
173
Florida
May 10, 2022
#11
  • May 10, 2022
  • #11
I will try to take a pic of my 83 after my afternoon nap.....
 

limp

wrap a little cheese around it and its a done
5 Year Member
Oct 4, 2020
5,465
2,898
173
Florida
May 10, 2022
#12
  • May 10, 2022
  • #12
Here they are... My car is an 83 5 liter convertible built in may of 84..
 

85GTStangGuy

5 Year Member
May 19, 2021
1,001
625
133
Jax, Florida
May 10, 2022
#13
  • May 10, 2022
  • #13
Isn't that second connector (coming from the washer pump harness) for the fluid level indicator/light? There is a connection point for it on the reservoir just forward of the pump connection on my car. But it's an '85, so it may be different.
 

limp

wrap a little cheese around it and its a done
5 Year Member
Oct 4, 2020
5,465
2,898
173
Florida
May 10, 2022
#14
  • May 10, 2022
  • #14
85GTStangGuy said:
Isn't that second connector (coming from the washer pump harness) for the fluid level indicator/light? There is a connection point for it on the reservoir just forward of the pump connection on my car. But it's an '85, so it may be different.
Click to expand...
I will look again, even might take off the reservoir to check... I took a quick look and did not see any plug in for it... I will look again
 

limp

wrap a little cheese around it and its a done
5 Year Member
Oct 4, 2020
5,465
2,898
173
Florida
May 10, 2022
#15
  • May 10, 2022
  • #15
Took the reservoir off and there is nothing else on it or in it to plug into...... Do you have a manual where you could trace the wiring by color code??
 

85GTStangGuy

5 Year Member
May 19, 2021
1,001
625
133
Jax, Florida
May 11, 2022
#16
  • May 11, 2022
  • #16
I know the aftermarket replacement reservoirs don't have the fluid level sensor typically, but your engine compartment looks pretty original, so I would think your reservoir is the one that came with the car.

Here's what mine looks like....
 

Attachments

  • WasherReservoir.webp
    122.8 KB · Views: 162

limp

wrap a little cheese around it and its a done
5 Year Member
Oct 4, 2020
5,465
2,898
173
Florida
May 11, 2022
#17
  • May 11, 2022
  • #17
I took the reservoir off today and took some more pics..... I assume this is the original reservoir..
 

manicmechanic007

5 Year Member
Sep 26, 2017
2,531
713
143
Roy, Utah
May 11, 2022
#18
  • May 11, 2022
  • #18
The extra connector real close to the washer pump take out should be for a low washer fluid light that your Mustang does not have
A Capri may have has the sensor if it was a RS and the harness is most likely the same
Your washer pump connector looks wired into the loom like it's supposed to be to me
Are you sure the washer pump motor is not kaput? and there is 12v there when you push the lever?
The other male connector may have gone to another ignition module connector that some had (a run retard switch or whatever they called it)?
 

CAMTWO1070

Active Member
Dec 17, 2021
238
79
38
NY
May 14, 2022
#19
  • May 14, 2022
  • #19
......




Looks like level indicator wires but according to ford the option didnt come out til 86....LOL
 
Last edited: May 14, 2022

CAMTWO1070

Active Member
Dec 17, 2021
238
79
38
NY
May 14, 2022
#20
  • May 14, 2022
  • #20
manicmechanic007 said:
The extra connector real close to the washer pump take out should be for a low washer fluid light that your Mustang does not have
A Capri may have has the sensor if it was a RS and the harness is most likely the same
Your washer pump connector looks wired into the loom like it's supposed to be to me
Are you sure the washer pump motor is not kaput? and there is 12v there when you push the lever?
The other male connector may have gone to another ignition module connector that some had (a run retard switch or whatever they called it)?
Click to expand...
Im pretty sure that only the 86-89 GT's have the washer fluid reservoir with a sensor and maybe the 94's too but you never know with Ford...The info is never accurate..........LOL.

https://lmr.com/item/LRS-617618/mustang-windshield-washer-reservoir-with-low-fluid-sensor-86
 
Last edited: May 14, 2022
Reactions: manicmechanic007
  • 1
  • 2
Next
1 of 2 Next Last
You must log in or register to reply here.

Similar threads

1
Electrical Headlight harness trouble
  • 1985fox
  • Apr 14, 2026
  • Fox 5.0 Mustang Tech
Replies
7
Views
228
Fox 5.0 Mustang Tech Apr 17, 2026
AeroCoupe
Progress Thread 93 LX father son project
  • ZAM93LX
  • Oct 26, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
24
Views
1K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Dec 3, 2025
Scrapla347
Resolved Holley terminator integration into CCRM
  • BrandonMP
  • Feb 25, 2026
  • SN95 4.6L Mustang Tech
Replies
1
Views
238
SN95 4.6L Mustang Tech Feb 27, 2026
BrandonMP
1
Electrical 1985 mustang gt Led conversion trouble
  • 1985fox
  • Jan 5, 2026
  • Fox 5.0 Mustang Tech
Replies
10
Views
607
Fox 5.0 Mustang Tech Jan 15, 2026
1985fox
1
A
P0036 P0056 P0137 P0157 2020 Ford Mustang GT
  • AmkoA
  • Jun 16, 2026
  • 2024+ (S650) Mustang -General/Talk
Replies
0
Views
87
2024+ (S650) Mustang -General/Talk Jun 16, 2026
AmkoA
A
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?