I had the same issue with a 2001 Mustang. Here is what I found out in the hopes it will help some one out:
Battery would be dead after a few days if car was not driven. Checked current from battery with car completely turned off. Over 300mA current. Started pulling fuses under the hood. 40A Maxi fuse number 6 caused the current draw to drop to a few milliamps. Problem was shorted output transistors in the Mach sound system bass amp in the trunk (right side). Found it by pulling connectors, one at a time. Seems the amps get standby power to keep the electronics “warm” to avoid a pop when turned on. Found replacement transistors at Digi-Key electronics and fixed it up. All works fine now and car can sit for two weeks and start just fine.
Now for the data that will help you troubleshoot:
When operating normally, remove fuse F6. Put your meter in place of that fuse and set on Milliamps DC. When you close the doors with the car off the meter will read over 200mA (I have an LED dome lamp - yours may vary) until the dome light shuts off. Then the meter will read about 112mA for about 40 minutes. After that the PCM goes into standby and the meter will read about 12mA steady state.
Anything else, and you have something causing a parasitic draw on the battery.
BTW, I mentioned this repair to my daughter who used to drive the car and she said “Oh, yeah. That was Bone Thugs and Harmony”
8条评论
I have the same problem with my 2003 SVT Cobra, if I let my car sit for 3-4 days my battery will die. Changed the battery and had the alternator rebuilt but the battery will still drain . I suspect the voltage regulator might be faulty.
由 Edward Broomall 完成的
if you have a aftermarket anti theft device installed under the steering column they wont let the main relay go to sleep mode, so it keeps a constant draw above 1 amp. sleep mode draws about 0.025 amps. when you turn engine off, sleep mode occurs about 15 mins later
由 Sean Case 完成的
I just bought a 2003 mustang… battery was dead bought brand new one and drove home…whome...went out to start car this morning battery was again dead…also car feeks like it's losing power pulling a hill
由 Johnny Hobbs 完成的
Where is the hood light located?? My father is having this same issue with his 2000 Ford Mustang.. the hood light is the last possible thing he has to check.. he just needs to know the location.. (there isn't a light anywhere.. that's visible..) Thank you.. any help is appreciated
由 Carmen Soliz 完成的
I have a 1999 mustang the v6 3.8 and it’s doing the exact same thing however my speed odometer , my fuel gage and my mileage don’t work either and I can’t figure it out. And then the other day I was talking to a guy who worked on fords all his life and he said it’s a common issue with the mustangs around that year and he told me that it was the ecm under the stereo he said that he had the exact same problem in his moms fox body mustang, he said he got a new ecm and it fixed the problem completely so I’m gonna try it and see what happens.
由 Matthewsmartin83 完成的
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