• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

Ignition for Electric Fan?

  • Thread starter Thread starter GreatWhite
  • Start date Start date Jun 20, 2008

GreatWhite

Member
Feb 24, 2006
232
1
17
Fairfield, PA
Jun 20, 2008
#1
  • Jun 20, 2008
  • #1
With the DC controller, the yellow wire can be connected to any key-on hot source to trigger the controller to shut-off regardless of temperature.

Does anyone know any convenient key-on hot wires that aren't too tough to tap into under the hook? I was looking at the wiper motor, but not sure which wire is which.

Sometimes the fan runs for a short time after the car is shutoff and the car sounds weak next time I go to start it up. Any help would be appreciated!

Thanks, CJ
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
34
129
Jun 20, 2008
#2
  • Jun 20, 2008
  • #2
You can use the low coolant sensor if you have one. VPWR would also work. A convenient place to grab it is at the EVAP purge solenoid (it's in front of the bottom passenger-side of the radiator).
 

GreatWhite

Member
Feb 24, 2006
232
1
17
Fairfield, PA
Jun 20, 2008
#3
  • Jun 20, 2008
  • #3
No low coolant sensor. And I don't know what that abbreviation is (VPWR) so you lost me there.
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
34
129
Jun 20, 2008
#4
  • Jun 20, 2008
  • #4
GreatWhite said:
No low coolant sensor. And I don't know what that abbreviation is (VPWR) so you lost me there.
Click to expand...


Thanks to S&2B's (host) and Tom Moss (author).

Look at the output from the EEC relay. All those red wires are VPWR, or key-on 12 volt feeds to most all of your solenoids, injectors, the coil, and so on. Included is the Purge solenoid. With something like the purge solenoid, it's a two wire solenoid so it's easy to find the VPWR wire.
 

GreatWhite

Member
Feb 24, 2006
232
1
17
Fairfield, PA
Jun 21, 2008
#5
  • Jun 21, 2008
  • #5
Thanks a lot HISSIN!
 
You must log in or register to reply here.

Similar threads

C
Electrical HELP! 1989 5.0 Stick, Voltage Bleed onto Ignition Trigger wire
  • ChickenDeluxe
  • May 14, 2026
  • Fox 5.0 Mustang Tech
Replies
7
Views
255
Fox 5.0 Mustang Tech May 24, 2026
ChickenDeluxe
C
Electrical Key on power for Fan relay
  • Nine Finger Wrenching
  • Jan 14, 2025
  • Fox 5.0 Mustang Tech
Replies
7
Views
480
Fox 5.0 Mustang Tech Jan 20, 2025
Nine Finger Wrenching
8
Electrical Crank-no start ... no spark ... no injector pulse, was it something I did? (redux)
  • 85gtCOBRA
  • Oct 28, 2025
  • Fox 5.0 Mustang Tech
Replies
2
Views
588
Fox 5.0 Mustang Tech Oct 29, 2025
85gtCOBRA
8
1999 Mustang GT - No Start- Need help understanding the fuel pump circuit and how it works
  • 99gtGuy
  • Nov 4, 2025
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
1
Views
538
1996 - 2004 SN95 Mustang -General/Talk- Nov 7, 2025
04newedge-
0
Engine Duraspark ignition box
  • limp
  • Oct 26, 2024
  • Fox 5.0 Mustang Tech
Replies
12
Views
630
Fox 5.0 Mustang Tech Jul 21, 2025
manicmechanic007
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech
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?