Very nice unit but the product does not have the installation wiring manual with it. It tells you what wire but not how to hook it up or test the circuits. I have installed 3 remote start systems and they were all Bulldog brand. This is the 1st Viper. The Viper is a much nicer unit with a lot longer range but this one is not very descriptive on how to install it. I installed this one on my truck that had the old worn out bulldog unit on it. ( I couldn't get the replacement remote for the bulldog ) I had to use a combination of the bulldog manual, a viper 5901 manual ( which is way more descriptive) and a lot of internet searching to get this installed. I went to the Directed web site for information and unless you are a dealer or want to pay $350 they will not give you the information on how to install it. Nice unit once installed. I had to find out the hard way about the wiring on the light switch not being labeled correct and the unit coming from the factory with the manual transmission mode. The Bulldog took me start to finish about 3 hours to install. This one took me 6 and I already knew where most of the wires were. This unit would be rated at 100% satisfied if it wasn't for the installation manual. If this is the 1st unit you ever installed I would look for a different one if you are going to do it yourself. If you are experienced go for it!
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