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if the alarm/immobiliser could be bypassed the thieves would have it away in no time....you will have to buy a new remote and have it coded to the car.....
sometimes it depends on the type of allarm, if it is factory fitted they are a nightmare to do as most of the wireing for the allarm is intergrated into the loom, where as if it is an after marked alarm ( one fitted later on ) it shouldnt be to bad but still a long and complicated job to find all the wires and reconnect the originals bypassing the immobiliser/alarm if you are a complete novice this should not be attempted as you could immobilise the car completely, best thing for you to do is get an auto electrician to have a look at it for you, sorry its not much help
If you look under the dash board you will see a box that don't look like it is part of the car. You can tell because all the wires going to it is different in appearance. They probably look newer too more than likely. Under the dashboard by the driver side is where alarm installer usually put the device. Unplugging the connectors to that box usually disables an aftermarket alarm.
there is often a small back up battery in the immobiliser unit itself, if you can locate this unit and replace the battery with the ignition on / engine running, then it should not need recoding and work fine after that. The other thing that could be wrong is the key battery (if the fob has one) or the transponder chip in the key head. If the key signal is low the immobiliser lamp will light during driving, but this does not explain the alarm going off. That is more likely either a poor vehicle battery, alarm / immobiliser back up battery, or another electrical fault such as water leakage into a tail-light or even the alarm unit itself when it rains. A lot of alarms are voltage sensing and when the vehicle is parked they will alarm if the battery voltage changes for any reason, though not during driving so the battery in the immob is my first choice to look at.
sorry i could no doubt sort it but i would need car in front of me,check the ignition module which could be in the dist or under the coil first before you start playing with the wires ,but yes sounds like the other wires could be an isolator switch or boy racer weekend mechanic alarm,dont know why people are guilled and fooled into fitting these useless things they always go wrong and have to be removed,cant beat a decent steering wheel antitheft lock.
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