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

why wont computer go into self test mode??

  • Thread starter Thread starter noslow5_0
  • Start date Start date May 25, 2004
N

noslow5_0

New Member
Nov 7, 2003
422
0
0
dallas tx.
May 25, 2004
#1
  • May 25, 2004
  • #1
a friend of mine just got a fox body, and im trying to find out why his cel is on.... when he initially got it, i tried to run the codes for it, and accidentally jumped the wrong connector... nothing happened, but the light is on now!!! I dont know if i havent let the computer sit long enough or something unplugged, but i cant get the cel to shut off, or run the codes!!! i was thinking a ground??? any body with any suggestions??
 
N

noslow5_0

New Member
Nov 7, 2003
422
0
0
dallas tx.
May 26, 2004
#2
  • May 26, 2004
  • #2
anybody????
 

jrichker

StangNet's favorite TOOL
In Remembrance. Thank you for your contributions
Mar 10, 2000
27,512
2,813
234
Dublin GA
May 26, 2004
#3
  • May 26, 2004
  • #3
disconnect the battery for 20 minutes or so.

for future reference, here's the how to do it for computer testing...

Here's the link to dump the computer codes with only a jumper wire or paper clip and the check engine light, or test light or voltmeter. I’ve used it for years, and it works great.

See http://www.troublecodes.net/Ford/
OR
See http://www.dalidesign.com/hbook/eectest.html for more descriptive help
OR
See http://www.mustangworks.com/articles/electronics/eec-iv_codes.html
 
N

noslow5_0

New Member
Nov 7, 2003
422
0
0
dallas tx.
May 26, 2004
#4
  • May 26, 2004
  • #4
well ive run the codes on the computer in my 90 all the time, but his just wouldnt work... i think im gonna try to ground out the STI an see if that will work....
 
You must log in or register to reply here.

Similar threads

S
Fuel ‘88 GT Runs Rich Cold — Fixes Itself When I Unplug Sensors (ECT, MAF, O2, etc.)
  • Sufarry
  • Nov 6, 2025
  • Fox 5.0 Mustang Tech
Replies
12
Views
900
Fox 5.0 Mustang Tech Nov 9, 2025
Mustang5L5
Electrical Ecu wont read codes
  • 5.0ed
  • Jul 17, 2024
  • Fox 5.0 Mustang Tech
Replies
0
Views
320
Fox 5.0 Mustang Tech Jul 17, 2024
5.0ed
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
593
Fox 5.0 Mustang Tech Oct 29, 2025
85gtCOBRA
8
L
Engine Why won't the motor start if I have spark and fuel
  • LeviAnderson
  • Nov 20, 2025
  • Fox 5.0 Mustang Tech
Replies
3
Views
435
Fox 5.0 Mustang Tech Nov 20, 2025
AeroCoupe
Resolved 93 Mustang 5.0 - Cranks but does not start
  • dan50
  • Jul 18, 2026
  • Fox 5.0 Mustang Tech
Replies
6
Views
209
Fox 5.0 Mustang Tech Jul 18, 2026
dan50
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?