"I bought a vehicle that came with a code alarm CA421 remote starter installed in it and the light on the antenna does not come on and has not worked since I got the car. What should I look for or where do I start to troubleshoot it? Please help!!"
Troubleshooting and diagnosing most remote starter problems can be a long process, especially when trying to use the internet to get some answers. And most of the time it's usually not something that can be easily fixed. Even if you installed the system yourself or you're a remote starter technician, contacting professional tech support by phone is the only efficient way of diagnosing the possible causes (which can be several). And if you’re not the installer or a technician, rarely is the fix a “DIY” situation. First, you need to know the make and model of the system that is installed in the vehicle. Then not only having the proper tools on hand, which includes some type of 12VDC test probe or digital multimeter, and 90% of the time you will need to locate where in the vehicle the systems’ main control module was installed to make any of the needed tests and/or check some connections (and that's the easy part). Basically, it can get a little extensive with the troubleshooting process.