A car alarm installation manual is normally included with the alarm, but if you bought a vehicle that already had an alarm installed but the previous owner lost the manual, don’t fear. The first and best place to look is at the manufacturer’s website. You will need the make and model of the alarm when you go to the website. If the manufacturer website does not have a down-loadable manual, it is probably best to call their customer service line and see if they can send you one. As a last resort check the site manualsonline.com. They have tons of manuals available for download.
For more info, see How to Install an Autopage Car Alarm