My fuse 120a which controls everything is blown because when trying to charge the battery the current was switched. I have purchase a new fuse to replace it but I can't remove the old one. It has a bolt that holds it in place and I can't remove the box. We've tryed a screw driver to open up the latches that hold the box in place, because we are suppose to flip it to remove the bolt so that the fuse can be removed. Help please
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Re: remove fuse 120a
You cannot change the fuse the way that you are trying. You need to loosen all of the bolts that holds the fuse box to the inner fender, and then observe the sides of the box, there are tabs that allow the exterior/bottom of the box to be pulled DOWN. After the box bottom is released, the 120 Amp fuse is accessible.
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If there is other equipment in the car such as a high power amplifier or audio system, disconnect and see if it charges. Also check voltage on battery when you think you are at full charge. You may have a damaged cell inside the battery. Voltage should be around 12.8 to 13V dc.
20A starter fuse? There is a heavy black/red wire that connects directly to the starter. The 120A FUSIBLE LINK 1 protects the charging circuit. There are two white wires that are connected to 30A FUSIBLE LINK 8. From there, power goes to the ignition switch and from the switch to the park/neutral position switch. That switch output is applied to the starter.
depends on type fuse
some also have screws that hold them down
locate fuse box under hood
look for blown fuse, if NOT screwed in just pull straight up to remove, reverse to install new one
if screwed in just remove screws (righty tighty / lefty losy) reverse to install new fuse
OK the battery in good charge should be at 12.5 volts ( as measured with a voltmeter across the terminals) When the engine is running you should expect the reading to be about 14 volts. Put the lights on ( a load on the battery) and the voltage can go as high as 14.5v.
Switch everything off (I mean everything..radio etc) and disconnect the negative terminal to the battery. Now put the meter in ammeter mode and measure the current between the negative terminal and the cable that is now disconnected. It should be really very low current (milliamps at most), switch on the lights to show ourself what that current drain looks like. If the residual current looks significant take out each fuse in turn and return it noting on pen and paper any drop in current when the fuse is out. This process will identify the circuit that is draining the battery. Check the wires and junctions in this circuit for shorts etc. If its lights try removing bulbs until the current drain stops If possible leave the fuse out over night on this circuit and see if this effects the battery's ability to charge and stay charged.
In the 1995 and later Crown Victoria's, there is a fuse in the fuseblock that controls the alternator's charging of the battery. If that fuse is blown, your car will drain the battery and cut off as you stated.
Check the fuse block under the hood and the one located on the left driver side above the hood pull.