Car has 200k and is tired, stalled on busy street when all 12 volt power was lost, had it towed home and installed a fresh battery I then got lights for a minute or so and the starter clicked once then nothing. I checked all fuses inside and on fire wall all are OK but no power to any of them but have power on cable up to the fuse box. thanks
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check that the coil is the correct voltage in use start/ run 12 volts or start 12 volt run 7.5 volts ( a 7.5 volt running on 12 volts= faulty ignition resistance wire == all the time will fail from over heat condition)
next feel the coil when it stops --it should be warm but not hot to the touch
next test/ replace the ignition control module
These items will loose capacity to operate if they get too hot from component failure but in cooling down will again work until they get hot again
low idle causes the alternator go below min voltage = batt light
main harness for the engine compartment is routed between the
firewall and exhaust header/egr tube. Bad location plus the harness is attached to the metal coolant by-pass tubes, a failing motor mount
could let the harness "ground". A '95' Taurus usually takes 2.5 to 3 years to eat a fresh battery. The elect system is draining the battery
even when its parked!. If the cables/terminals are sound and tight and a voltmeter test indicates 13.75 - 14 volts when checked at the batt terminals, with engine at idle and tranny in park. Have someone
apply the brakes and shift to reverse, take another voltmeter reading. There shouldn't be a significant drop in the two tests. If the engine rocks badly on the mnts and the second test has a voltage drop under 12 volts. Then a short to ground is very likely. Take it to a parts house that will test the battery and alternator for you.
but if the battery is over 2 yrs. old, then your going to replace it soon.
let me know if you would please.
I would look at the positive cable at the battery and at the starter. Pull the cabel off and a continuity test to see if the wire has a internal break if the wire gets even a pinhole it can build corrosion on the inside of the wire and when a current is put through it it seperates (from the resistance and arc from corrosion) causing the wire to seperate internaly.