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Re: car alarm in-line fuse
What type of alarm system is it? The size of the fuse varies slightly depending how extravagant the alarm is. You could try to low ball it and if it pops the fuse then get a slightly bigger one. You might start out at 15 amps. BUT, if you can tell me the make and model of the alarm then I might find out the correct size. I hope I can help. -Andrew Hawkins
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Do you have the correct size fuse as listed in the manual or on the fuse cover? If so do you have an after market alarm system? Many times the after market installers will use a wire that they know is hot. often an always on radio memory wire? If you bought the car new and did not install an alarm or change out the radio out then you may need to bring it into a shop that traces wires. if you bought it used and you have the correct size fuse there is no telling. Caution do not in cress the size of the fuse beyond the recommended size or you could have a fire.
Have you tried locking all the doors windows up then using the door key not the key fob if you have one. Put the key in And manually unlocking the door this usually resets and disarms the security system in most modern vehicles. The alarm and security system will continue to function properly but this a a manual override to shut down the security systems sensors and make the audible alarm system to reset and stop sounding the ala
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Aftermarket alarm systems do not have there fuses in the cars fuse boxes, the fuses are located in line to alarm system. You will need to look under the driver side of the dash and locate the alarm box, and then follow wires back a little, there you will see a few fuse holders containing the fuses for that alarm system good day
There are still components of the alarm interfering with your vehicles operation. Now, you have two choices. 1. remove all components of the alarm or 2, properly wire the alarm back into power. If you have the FOB's for the alarm and the only reason you removed the it was because it blew that fuse I would tap the power line and reactivate the alarm system as that is going to be the easier of the two solutions. If You opt for option 1 you will need to locate all components of the alarm that were installed to include starter kill devices which may not be an easy task since you didn't originally install that alarm. Depending on how it was wired it it could be using slices that weren't properly made or protected which is causing the issues or they could have used connectors that are hard to identify.
Gather materials. You will need scissors or a knife, crimps,
solder material, solder gun, test light, drill, screw bit, screws, tie
wrap, double-sided mounting tape and a voltmeter.
Read the installation manual that comes with the alarm. Make
sure you understand what the instruction manual says. If you purchased
the alarm from an automotive store, you can always ask them some basic
questions to help you get started.
Call the tech support number for manufacturer of the alarm
and tell the tech advisor what kind of car you have. Ask what kind of
locking system your car uses and what color wire to connect to in order
to interface the lock/unlock feature of your alarm,
Ask the advisor how to hook up the relay for the door lock
feature, what color wire to connect to for the starter disable feature,
and how to hook up the relay.
Ask how to set up the voltmeter to test the door lock wires.
Ask how to access the factory door triggers.
Determine where you intend to place the components by
referring to the installation manual.
Mount the siren to a solid metal surface under the hood.
Point the horn of the siren down toward the ground so that moisture
cannot collect inside it. Drill a hole through a rubber grommet in the
firewall of the car and feed the siren's wire through that hole into the
passenger compartment of the car.
Connect the alarm's power wire directly to the car's battery.
Feed the wire through the rubber grommet on the firewall and into the
passenger compartment of the car.
Put a fuse on the power wire next to the battery. Check the
installation manual for the fuse size.
Mount the shock sensor as described in the manual.
Drill a hole in the dash where you intend to place the LED
status indicator. Feed the LED's wire through that hole and place the
double-sided mounting tape to the back of the LED and place it over the
hole in the dash.
Locate the wires that work the car's power door locks.
Connect the door-lock relay to the lock/unlock wires and
connect the alarm wire to the relay in the manner described by the tech
Using the advice of the tech advisor, locate the wire that
works the courtesy light if the alarm has current sensing.
Connect the current sensing line from the alarm to the
courtesy light wire.
Locate the factory door triggers if the alarm does not have
current or voltage sensing.
Connect the factory door trigger to the alarm.
Find the starter wire on the steering column some inches
below the starter switch. Cut the line and connect the starter disable
relay. Connect the starter disable wire from the alarm to the relay.
Mount the valet switch somewhere under the dash.
Connect all the wires to the proper inputs and outputs of the
Mount the module to a sturdy surface under the dash using the
drill, screw bit and screws.
Use the tie wraps to secure the wires of the harness and
stuff it back under the dash.
How old is the alarm? If you have glass breakage detection or motion sensors installed one of these could be faulty. If the alarm is more than a year old and it's an after market alarm it is possible the alarm is faulty and needs to be replaced. There is a fuse in the power supply line, usually running along the firewall between the power point and the alarm. Remove this fuse and the alarm should be deactivated but the ignition kill switch will not be active so you can use the vehicle and the siren will stop going off.