Blown fuse for interior lights, door locks and trunk relese.

Very Possible it is your fuse, the only thing that makes me think otherwise is that your problem is intermittent. When a fuse blows, things stop working they do not work intermittently. If you recently installed a stereo, check the harness for crossed connections or exposed wiring that may be causing a short. When you blow the fuse for the stereo it usually takes out many of the interior electronic accessories such as Interior dash lights, electronics door locks, dome lamps, etc. Check the fuse box likely under the dash, if not in a corner of the engine compartment under the hood and find the diagram for the fuse lay out. Check the fuse for the stereo or interior accessories or for the door locks. problem could be with the wiring for either.

That's a lot of things out! I think you need to check to see if there is a large fuse blown (Maxifuse) in the underhood panel,or maybe you accidentally unplugged something by accident while charging the battery.

The short is probably an electronic device which shorted a semi conductor in it's cicuit. Even replacing a fuse will only blow them out right away. Do you notice anything electronic that do not work? For example the radio or something. Anyways I am from houston as well.

if it blows as you press the remote, it must be one of the lock actuators.
If it does it only when you unlock the dirver's door, that would be the actuator to replace. It probably is shorted internally.

do you have an aftermarket stereo? if you do, unplug it and see how long the fuses last. check your lighter and make sure there are no foreing object in there that can cause a short. when you replace the fuses, take notice of which action causes the fuses to blow... for example, door lock unlock, are they still ok, door lock, lock..check again, mirror left, still ok, so forth and so on. take it one at a time and see which action causes them to blow. when they blow do it again to see if the same action that caused them to blow the first time did it again, then trace those wires. you probably have a bad relay somewhere.

There is most likely a fault in the system and it will have to be reapired by certified tech

find the short circuit, to do this disconnect the systems the fuse supplies power to one at a time until u isolate the one that is shorted to ground, then it is matter of checking the wiring harness until u find the damaged wiring.

Hi!

Since you've got a '96 I assume your #15 fuse is 10 amps and for the following components:

Audio System, Courtesy Lights, Door Open Light, Trunk Light, Glove Box Light, Remote Control Central Locking System, Oil Level Sensor, Seat Belt Reminder, Data Link Connector.

Turn ignition to OFF, turn off all interior lighting (by operating the selector inside the car), close all doors, wait about 20 seconds and insert a new fuse. If the fuse is blown immediately upon insertion my guess would be that you have an aftermarket audio system with faulty wiring or maybe something is wrong with you Data Link Connector. If that is not the case the problem might prove a little bit harder to find, and you'll definitely need a wiring diagram. Check this site:
http://www.volvoclub.org.uk/volvo_workshop-850techdocs.shtml

If the fuse is not blown immediately upon insertion: Good, the components affiliated with the fuse can then be grouped by what ignition position they are active at (OFF, 1, 2) and tested individually.

POSITION OFF:
- Door open light, courtesy lights, glove box light, trunk light, remote central locking system.
Make sure the glove box light really is turned off when closing the glove box.
After that it's simply a matter of testing these components one after the other (with the ignition at position OFF) by opening/closing doors, turning on/off trunk light etc, checking the fuse between each component test.
Make sure that the interior lighting is turned off when you test the central locking, or else you might end up faulttracing central locking when the problem was with the interior lighting :)
(Since the interior lights can be set to turn on when the central locking is operated).

POSITION 1:
- Usually the audio system, unless it's an aftermarket system.
If the fuse breaks the second you turn the ignition to position 1 the audio system probably has faulty wiring.

POSITION 2:
If the fuse breaks the second you turn the ignition to position 2 one of these two components is the culprit:
- Seat belt reminder, oil level sensor.
Fasten all seat belts and try again with a new fuse.
If the fuse still breaks the oil level sensor is most likely the culprit.
If the fuse didn't break the seat belt reminder is the culprit. If so you can simply disconnect the seat belt reminder relay, ridding you of both your fuse problem and the annoying seat belt reminder. The relay is located behind the cover over the drivers feet (easily removed, just a couple of torx screws, no breakable interior clips).

The central locking relay and the alarm module are also found there, as well as some other electrical components.

The Data Link Connector is an unlikely culprit, but it's probably best if you unplugged it completely during testing.
If everything turns out ok with it disconnected you can test it at the end. (The Data Link Connector is the OBD II conncetor located by the coin holder, in front of the gearchange).

Good luck!

i would first look in the main wire harness unbdere the dash on the drivers side it leads into the door also there is a harness that leads up the steering column to your dimmer/turnsignal module in the steering column. if your door locks stop working it colud be the master switch control in the drivers door this is whjere i would look for the short

check to see if your "interior cabin lights" fuse isnt blown it is a 15amp fuse one of the top two rows in your fuse box. i have a 2002 A4 avant and when that fuse blows my security beep doesnt make any sound but the doors lock.