Go Back   Ford Mustang Forums > Mustang > 5.0 Mustang > 5.0L Tech

Welcome to our Mustang forums where Mustangers come together to hang out, discuss and enjoy their favorite Mustang hobby with fellow Mustang enthusiasts. We invite everyone to read, post, and enjoy our Mustang forum as well as the many other sections of our site.

You are currently viewing our forums as a guest. By joining our community you gain access to post topics, communicate with members, upload your photos and access many other special features. Registration is fast, simple and free so why wait, join our Mustang community today! If you have any problems with registration or your account login, please contact support.

5.0 Mustangs Tech Forum

5.0L Talk | 5.0L Tech | 94-95 Tech | 1979-1993   1994   1995   Upload Pictures | Timeslips | Power Adders | Mustang Tech 


Reply   Post New Thread
Unread 02-04-2012   #1 (permalink)
Corey D is offline Rookie


Joined: Apr 2011
Posts: 45 Threads: 21
 Corey D's Country Flag  View Corey D's 6 photos
Levittown   New York
Corey D is on a distinguished road
Default Huge battery drain

My battery keeps dieing so i tested for a parasitic draw and its about .6 amps which is like 12x what its supposed to be. When i disconnect the battery and reconnect it the iac clicks as well as a few different relays. I disconnected the ignition switch and tried again to eliminate that but with it disconnected all the relays and iac still click when the battery is connected. The car originally had a 2.3 and was swaped to a 5.0 so the wiring was changed before. Any ideas of what could be causing everything to turn on right away?
Corey D is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Sponsored Links
Advertisement
 
Unread 02-05-2012   #2 (permalink)
specializedbndt is offline Apprentice


Joined: Jan 2008
Posts: 114 Threads: 11
 specializedbndt's Country Flag  View specializedbndt's 24 photos
charleston   South Carolina
specializedbndt is on a distinguished road
Send a message via AIM to specializedbndt
Default

thats odd, the only time ive heard relay clicks is during a code scan......
__________________
kennebell super charger,t-56 6 speed tranny, aluminum drive shaft,center force clutch,bbk long tube headers,hooker aerochamber mufflers,42lb injectors,sct 6600 chip, 76mm c&l maf,70mm throttle bodie,bbk cold air intake,cobra lower intake,GT40 heads,proform 1.6 roller rockers, renegade hardened push rods,mallory fuelpressure regulator,msd ignition,blaster coil, bbk lowing springs,upr upper and lower control arms, ford racing 3.73 gears,saleen sc replica wheels,saleen body kit, subframe connectors
specializedbndt is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 02-06-2012   #3 (permalink)
no_rice_nate is offline Rookie


Joined: Feb 2012
Posts: 13 Threads: 2
 no_rice_nate's Country Flag
indianapolis   Indiana
no_rice_nate is on a distinguished road
Default

It also clicks when the computer powers up when you turn the igntion on. My guess would be the computer is on at all times. Could have possibly been wired so computer is straight to a battery source instead of key on source but that would mean it has something else wired differently to shut off ignition to kill the engine. Or possibly the relay for the computer is stuck closed.
no_rice_nate is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 02-06-2012   #4 (permalink)
specializedbndt is offline Apprentice


Joined: Jan 2008
Posts: 114 Threads: 11
 specializedbndt's Country Flag  View specializedbndt's 24 photos
charleston   South Carolina
specializedbndt is on a distinguished road
Send a message via AIM to specializedbndt
Default

+1
__________________
kennebell super charger,t-56 6 speed tranny, aluminum drive shaft,center force clutch,bbk long tube headers,hooker aerochamber mufflers,42lb injectors,sct 6600 chip, 76mm c&l maf,70mm throttle bodie,bbk cold air intake,cobra lower intake,GT40 heads,proform 1.6 roller rockers, renegade hardened push rods,mallory fuelpressure regulator,msd ignition,blaster coil, bbk lowing springs,upr upper and lower control arms, ford racing 3.73 gears,saleen sc replica wheels,saleen body kit, subframe connectors
specializedbndt is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 02-07-2012   #5 (permalink)
Corey D is offline Rookie


Joined: Apr 2011
Posts: 45 Threads: 21
 Corey D's Country Flag  View Corey D's 6 photos
Levittown   New York
Corey D is on a distinguished road
Default

So should I check if the EEC relay is bad? And also whats the proper way to test a relay for being good if you pull it out I remember your supposed to test ohms between two terminals i just dont remember which 2
Corey D is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 02-07-2012   #6 (permalink)
no_rice_nate is offline Rookie


Joined: Feb 2012
Posts: 13 Threads: 2
 no_rice_nate's Country Flag
indianapolis   Indiana
no_rice_nate is on a distinguished road
Default

Well first off you should isolate the draw and make sure it is the eec staying on before you go any further. So unplug the eec relay and hook the battery up and lis
ten for the noises you heard. If you don't hear them do your draw test again. If its still making noise with the eec relay unplugged unplug the eec itself and do your draw test again. Let me know what you find and ill tell ya where to go next.
no_rice_nate is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 02-07-2012   #7 (permalink)
thereisnospork is offline Rookie


Joined: Jan 2012
Posts: 20 Threads: 5
 thereisnospork's Country Flag
Central   New Jersey
thereisnospork is on a distinguished road
Default

Check for current draw across each fuse to isolate the subsystem(s) causing the drain.
thereisnospork is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 02-08-2012   #8 (permalink)
spdjnky_42 is offline SHELBY GT 500 Member

5.0L Member


Joined: Nov 2007
Posts: 13,640 Threads: 204
 spdjnky_42's Country Flag  View spdjnky_42's 21 photos
St.Louis   Missouri
spdjnky_42 is on a distinguished road
Send a message via Yahoo to spdjnky_42
Default

^^^+1 pull fuses til the draw goes away check that circuit to be the entire drain.
__________________
When the green light drops...
The Bullsh!t stops. :shiny:
spdjnky_42 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 02-08-2012   #9 (permalink)
74stang2togo
Guest


Posts: n/a Threads:
Default

Make sure and check every circuit too.

I had an A/C compressor clutch coil do this to me on my '87 Mustang GT.
 
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 02-08-2012   #10 (permalink)
Corey D is offline Rookie


Joined: Apr 2011
Posts: 45 Threads: 21
 Corey D's Country Flag  View Corey D's 6 photos
Levittown   New York
Corey D is on a distinguished road
Default

I have tested all the fuses nothing makes the drain go away, I pulled the EEC relay out and when i hooked up the battery nothing clicked and the draw was down to .05

Inside the EEC relay looks pretty rusted and corroded so I'm assuming this is the problem. Does anyone know where I can find a replacement EEC relay or what company to get one from if I can't find a ford one?
Corey D is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 02-09-2012   #11 (permalink)
no_rice_nate is offline Rookie


Joined: Feb 2012
Posts: 13 Threads: 2
 no_rice_nate's Country Flag
indianapolis   Indiana
no_rice_nate is on a distinguished road
Default

Ok thats good you found the draw. There are two or three fusible links that hook up at the starter solenoid and the power for the computer comes from it so pulling the fuses will not kill the draw if its the eec staying on.

You should be able to get a relay at any parts store you will have to ask them to look it up cause its a special one to fit that connector. You may want to take your test light and check the relay connector before you buy one. You should have one power wire that is always hot and one that is hot only when the key is on. If you have two that are constantly hot that is whats keeping the eec on.
no_rice_nate is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Sponsored Links
Advertisement
 
Reply   Post New Thread

Tags
battery drain, ignition switch



Thread Tools



Mustang Photos
Mustang Links    Top Sites    RSS    Link To Us    Add to Favorites    Archive    Terms of Use    Site Rules    Privacy    Contact    Sponsors    Advertise   
AllFordMustangs is not affiliated with or endorsed by Ford Motor Company. ©Copyright 2002-2011 All Auto Enthusiasts Network

Search Engine Friendly URLs by vBSEO 3.5.2

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172