mudbrother
New member
Hello everyone. I am trying to hook up a remote start in my 97 OBS 5 speed. All diagrams I see say that accessory for heat /ac is gray and yellow. Our trucks have three of those in the ignition switch harness. 2 large wires and one small. Which one do I hook up to? I want both heat and ac to work. Do I need a relay for the horn? I was under the impression that it was a neg line I was tapping into already. Please excuse my ignorance. This is the first remote start I have installed. My unit is a Crimestoppers RS-4G2. Any install advice will be greatly appreciated. Thank you in advance.