OK Tech Heads...Here's One for Ya.

"Mongoose"

New Member

Apr 1, 2005

21

0

0

Vancouver,Wa.

Sep 23, 2005

#1

• Sep 23, 2005

• #1

When I turn on the ignition key, the EEC fuse blows.
I've done everything from unpluging the CCRM, the fuel pump,
traced the wiring harness from the fuse block to the EEC.
The wiring is in solid condition, the CCRM is new, and the fuel pump
works fine.(I jumpred the the pump just to make sure)
Please fire away any and all ideas.

 

shttygtstang

New Member

Jun 2, 2004

978

0

0

Sep 23, 2005

#2

• Sep 23, 2005

• #2

well this might sound not so good but when i have a short i a wire and cant find it i stick tin foil on the fuse let it run till it catches fire . It will ignite were its grounding out

 

8

89white50

Member

Nov 16, 2004

440

1

18

central MA

Sep 23, 2005

#3

• Sep 23, 2005

• #3

LOL!!!!!!!!!!!!!!!!!! i would just keep looking for a grounded wire before TRYING to set my car a blaze

 

shttygtstang

New Member

Jun 2, 2004

978

0

0

Sep 23, 2005

#4

• Sep 23, 2005

• #4

well first ide break down the hole wiring loom and look but it works hey

 

Dbeck002

New Member

Apr 30, 2005

710

0

0

South florida

Sep 24, 2005

#5

• Sep 24, 2005

• #5

Thats a good way to melt one wire and all the ones next to it and short every single circuit out lol...

 

S

ss93cobra

Founding Member

Apr 10, 2002

1,422

1

0

Wilmington NC

Sep 24, 2005

#6

• Sep 24, 2005

• #6

Doesn't sound like fun, but what about doing a continuity test?

 

jrichker

StangNet's favorite TOOL

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Mar 10, 2000

27,512

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Dublin GA

Sep 24, 2005

#7

• Sep 24, 2005

• #7

See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host) for help on 88-90 wiring

http://www.veryuseful.com/mustang/tech/engine/images/IgnitionSwitchWiring.gif

http://www.veryuseful.com/mustang/tech/engine/images/fuel-alt-links-ign-ac.gif

http://www.veryuseful.com/mustang/tech/engine/images/88-91eecPinout.gif

 

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jrichker

StangNet's favorite TOOL

In Remembrance. Thank you for your contributions

Mar 10, 2000

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Dublin GA

Sep 24, 2005

#8

• Sep 24, 2005

• #8

Keep in mind that fuse #18 does not feed either the ECC or fuel pump circuits.
If this is the fuse that keeps blowing, the problem is not likely to be in the ECC or fuel pump hardware.

Remove the passenger side kick panel. Then loosen the 10 MM bolt from the center of the big connector. When the bolt spins free, pull down on the connector assembly. Replace the bad fuse and apply power. If the fuse does not blow, you have a bad computer. If the fuse does blow, then you get to Ohm out the wiring on pins 37 & 57. You should see more than 100 ohms between these wires and ground.

Note that the same circuit also feeds the fuel pump power. Remove the fuel pump relay located under the driver's seat. Replace the bad fuse and apply power. If the fuse does not blow, you have a problem in the fuel pump circuit.

Diagrams courtsey of Tmoss & Stang&2Birds.

 

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HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

33

129

Sep 24, 2005

#9

• Sep 24, 2005

• #9

As J.R. SO wisely and often says, you need to provide information about the year of your car, accompanying modifications, etc. Otherwise it can delay people being able to help you.

I assume you have a 94-95 since you mentioned the CCRM (Constant Control Relay Module). Correct? The wiring paths are a bit different on an SN vs a fox (SN having the CCRM, underhood fusebox, etc).

I know Tom has authored an SN diagram or two and S+2B's is hosting them on his site. But I dont think it is anything that can help you out much.

I mainly wanted to atleast get the year of car straight. Good luck.

 

jrichker

StangNet's favorite TOOL

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Mar 10, 2000

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Dublin GA

Sep 25, 2005

#10

• Sep 25, 2005

• #10

AutoZone wiring diagrams

http://www.autozone.com/servlet/UiB..._us/0900823d/80/16/71/3c/0900823d8016713c.jsp for 79-88 model cars

http://www.autozone.com/servlet/UiB..._us/0900823d/80/19/59/5a/0900823d8019595a.jsp for 89-93 model cars

http://www.autozone.com/servlet/UiB..._us/0900823d/80/1d/db/3c/0900823d801ddb3c.jsp for 94-98 model cars

 

stangjunkie

New Member

Nov 15, 2004

381

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0

Sep 25, 2005

#11

• Sep 25, 2005

• #11

WOW..... pretty colors....

 

"Mongoose"

New Member

Apr 1, 2005

21

0

0

Vancouver,Wa.

Sep 26, 2005

#12

• Sep 26, 2005

• #12

Well, I must say you guy's are very good.
The information you've given me has payed off greatly. The diagrams were very helpful.
Tracing the problem rite to the #3 f/i plug.
After hours (days & nites) of testing and retesting, tracing and retracing the info
you gave me played a major roll in finding the falt and a quick fix.
I can't say thanks enough!!!
Thanks and off to the dyno we go.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

33

129

Sep 26, 2005

#13

• Sep 26, 2005

• #13

Another Jrichker success story.