remote start won't work

I just pulled code alarm sure start and I'm currently upgrading to the TW2 by Code Alarm. I cannot get the new alarm to recognize the tach line when I try to program the remote start feature. I want to test it but I don't want to blow out any sensors. Do I use a 12 volt tester or do I need a multi meter? I've installed plenty of alarms but I'm new to the remote start. Any help would be appreciated. ant

I hope that you understand my english.... You need a multimeter to detect tach wire. NEVER do it with a 12 volt tester. 1.-set your multimeter in Volts AC, (NOT in Volts DC) 2.-Attach red wire from multimeter on 12V on your battery. 3.-Attach black wire from your multimeter in the target wire, (wire that you guess is the tach wire from your car) 4.-Start your vehicle and the multimeter should read 0.6 to 1 V AC aproximately, when you accelerate your car, the read in the multimeter should rise. 5.- Finish, you have found the tach wire.