Search



Go Back   MustangForums.com > Ford Mustang Tech > 5.0L (1979-1995) Mustang > 5.0L General Discussion
Sign in using an external account
Register Forgot Password?
Search

5.0L General Discussion This section is for non-tech specific information pertaining to 5.0L Mustangs.

Welcome to Mustang Forums!
Welcome to Mustang Forums.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
 
 
 
Thread Tools Search this Thread
Old 03-19-2012, 09:32 PM   #1
rwdfan
2nd Gear Member
 
Join Date: Dec 2006
Vehicle: 1999 Ford Mustang GT
Location: Mckinleyville, California
Posts: 409
Exclamation No Fuel. Testing Fuel Pump and CCRM Pinouts? Help?!

Ok, so my new to me 94 GT died while AT THE DANG SMOG STATION! Just bought the thing, took it to be smogged, and it died. The stupid techs added 5 gallons of fuel...which I got charged full price for. They call me and say, we dont know whats wrong with your car, you need to come look at it. Funny thing is this is a mechanics shop too. I come by, stick the key in the ignition and twist...fuel pump doesnt come on. Big surprise. I look under the hood and the 20 amp fuse for the fuel pump is fine. So, I need to test my CCRM, but I don't know what/where exactly to test because I cant read those stinking wiring diagrams. I have these directions I found online.
"With the key turned to run and checking within the fuel pump prime-out period
(a duration of 2-5 seconds after turning the key to run): Check CCRM pin 5 for accessory 12 volts. If you have it, the issue lies downstream. If not: Check CCRM Pin 11 for constant 12 volts. Check CCRM Pin 13 for accessory 12 volts. Check CCRM Pin 18 for a ground signal during the prime-out."

So, if the CCRM is good, I then need to test my Fuel pump. Is that accessible under the back seat or do I have to drop the tank to test it?
This ad is not displayed to registered or logged-in members.
Register your free account today and become a member on Mustang Forums!
__________________
99' Mustang GT Convertible Auto - Black with Tan top/Leather...Bone Stock, for now ;-)
rwdfan is offline   Reply With Quote
Old 03-19-2012, 09:35 PM   #2
TrimDrip
5th Gear Member
 
TrimDrip's Avatar
 
Join Date: Jan 2009
Vehicle: 93, ford, mustang lx
Location: AL
Posts: 2,674
Default

try testing it by hitting the bottom of the tank with a rubber mallot

and no, there is no access panel to the tank.

Last edited by TrimDrip; 03-19-2012 at 09:38 PM.
TrimDrip is offline   Reply With Quote
Old 03-19-2012, 10:09 PM   #3
rwdfan
2nd Gear Member
 
Join Date: Dec 2006
Vehicle: 1999 Ford Mustang GT
Location: Mckinleyville, California
Posts: 409
Default

I kicked the crap outta the back of the tank with my foot. Ill try a mallet to the bottom tomorrow. But I still need to know about the CCRM. Also, since theres no access under the seat, is there a place I can jumper the fuel pump without dropping the tank?
__________________
99' Mustang GT Convertible Auto - Black with Tan top/Leather...Bone Stock, for now ;-)

Last edited by rwdfan; 03-19-2012 at 10:12 PM.
rwdfan is offline   Reply With Quote
Old 03-19-2012, 10:28 PM   #4
TrimDrip
5th Gear Member
 
TrimDrip's Avatar
 
Join Date: Jan 2009
Vehicle: 93, ford, mustang lx
Location: AL
Posts: 2,674
Default

You should be able to get to the wires somewhere. I am not sure where the inertia switch is but, it will run out of it. On a fox, it is in the trunk.

Look for a pink/black wire. That is the hot for the fuel pump. If it has voltage, you know what the problem is.
TrimDrip is offline   Reply With Quote
Old 03-19-2012, 10:45 PM   #5
rwdfan
2nd Gear Member
 
Join Date: Dec 2006
Vehicle: 1999 Ford Mustang GT
Location: Mckinleyville, California
Posts: 409
Default

Thanks for the info on the wiring for the inertia switch. That will work perfectly for testing the fuel pump. Since no one is forthcoming with the CCRM info, Ill test the fuel pump first, if it has no voltage I'll have to test the CCRM. Oh and FYI, the inertia switch on these is in the trunk adjacent to the drivers side tail light area. Thanks TrimDrip
__________________
99' Mustang GT Convertible Auto - Black with Tan top/Leather...Bone Stock, for now ;-)

Last edited by rwdfan; 03-19-2012 at 10:48 PM.
rwdfan is offline   Reply With Quote
Old 03-20-2012, 07:31 PM   #6
Bubba 95SN
4th Gear Member
 
Join Date: Apr 2009
Vehicle: 1995 Ford Mustang GT
Location: N.C.
Posts: 1,891
Default

The wiring for pump is accessable at back side of tank by rear bumper.
Bubba 95SN is offline   Reply With Quote
Old 03-21-2012, 02:18 PM   #7
rwdfan
2nd Gear Member
 
Join Date: Dec 2006
Vehicle: 1999 Ford Mustang GT
Location: Mckinleyville, California
Posts: 409
Default

Yup, it was the fuel pump. The power was on but nobodys home. Lol. Thanks guys!
__________________
99' Mustang GT Convertible Auto - Black with Tan top/Leather...Bone Stock, for now ;-)
rwdfan is offline   Reply With Quote
Old 03-21-2012, 06:44 PM   #8
TrimDrip
5th Gear Member
 
TrimDrip's Avatar
 
Join Date: Jan 2009
Vehicle: 93, ford, mustang lx
Location: AL
Posts: 2,674
Default

Good deal. Wonder if the car sat up for a long time? I have seen that happen a few times.
TrimDrip is offline   Reply With Quote
Old 03-22-2012, 01:34 AM   #9
rwdfan
2nd Gear Member
 
Join Date: Dec 2006
Vehicle: 1999 Ford Mustang GT
Location: Mckinleyville, California
Posts: 409
Default

It sat for 3 months before I bought it. I went and bought a Walbro 255 GSS340 in anticipation of major upgrades. Im hoping I dont have to disconnect the rubber fuel filler neck hose to get the fuel pump out. I dropped the tank and I have it propped up, we shall see. I hear they can crack. I checked on a new OEM replacement, 165$!!! If it does break, Im going to see if a generic dorman one will fit.
__________________
99' Mustang GT Convertible Auto - Black with Tan top/Leather...Bone Stock, for now ;-)

Last edited by rwdfan; 03-22-2012 at 01:39 AM.
rwdfan is offline   Reply With Quote
Old 03-22-2012, 06:20 AM   #10
TrimDrip
5th Gear Member
 
TrimDrip's Avatar
 
Join Date: Jan 2009
Vehicle: 93, ford, mustang lx
Location: AL
Posts: 2,674
Default

On a fox the filler neck slides out of the tank. Super easy The 94 must have changed. With all that said, I would just make sure I didn't knock lots of dirt in the tank while doing this. And take an air blower to it before I got the pump out. Personally, I would try to get it off but, I didn't know they were prone to break. I replace fuel pumps all the time and haven't had that problem yet.

I did change one on a 97 one time with no problems.
TrimDrip is offline   Reply With Quote
Old 03-22-2012, 06:20 AM
MustangForums
Ford Mustang




Paid Advertisement

 
 
 
Reply

Tags
1994, 1995, 50l, bad, ccrm, check, fuel, gt, key, mustang, pump, pumping, symptoms, v6, wiretapped

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Advertising

Featured Sponsors
Vendor Directory
New Sponsors
All times are GMT -5. The time now is 10:21 PM.

© Internet Brands, Inc.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.

This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company
Emails Backup