Question about 1995 Ford Mustang
I have a 1995 Ford Mustang GT 5.0L Convertible. It is constantly draining the battery - after 3 days of no driving it is completly drained. This has been an intermittent problem but is now getting worse. I have had 2 auto electricians check the car and they cannot find where the problem is. Battery has been replaced, current one is 9 months old. I now have to disconnect the battery when the car is not being driven for a period of time. It has an after market audio and DVD player. Any ideas as to what to look for would be appreciated as I am getting frustrated with this car!
I bought a 96 mustang. I have the same problem. My chime rings like the lights are on or keys are in the ignition. Check your steering column, if I move my tilt steering until the chime stops my battery doesn't die. Good luck.....
Posted on Feb 20, 2013
Check for current leakage.. I suggest you start from the DVD player connection and trace back to the main power supply.
Please let me know the Audio and DVD player Brand and models...
Posted on May 16, 2008
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Posted on Jan 02, 2017
Tips for a great answer:
I am seeing a lot of mustangs are having battery draining issues and I wish to share some simple solutions found while working on a friends 03 GT 4.6ltr.
In a quiet area, key switched off, hood up, Listen carefully close to alternator. I heard a high pitched hissing/whistle sound at low volume, came from back of alternator. This sound was the voltage regulator/rectifier staying on when key is off due to faulty diodes inside the voltage regulator/rectifier circuit, can cause battery to go dead after car not ran in about 2-7 days.
After having the alternator tested free at a parts store, test showed alternator was good because the faulty diodes in the alternator did not show up on the test, the machine did not test for faulty drain back issues that were present.
There was battery voltage running at all times through the two-wire connector on back of alternator. Disconnect the battery first for safety and to reduce chance of short circuit. The yellow wire/with white stripe is hot while car is off so I traced this from the 2-wire connector on the alternator then closer towards driver side front fender. Next I cut the Yellow/White Stripe wire, spliced a good connection wire to it and ran it through a hole in the fire-wall to the fusebox(under dash), connected it to a 15a fuse that does not get used but has power when key is turned on but no power when key is off.
The purpose for re-routing the hot wire to the alternator, is to turn off the alternator charging circuit when the key is turned off so it may not run down the battery. I am seeing good results with this fix(or patch) so far. No More Parasitic Battery Drain!
Another fix can be to change the small pulley on the alternator to a larger pulley so the alternator does not spin too fast, putting too much energy through the diodes can cause a charging system to act a fool. So if you have charging issues and have an alternator changed, putting a larger pulley on can make sense turn into saved dollars(especially on high revving engines).
I hope this info helps to solve some draining battery and/or alternator issues.
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