I just installed this keyless entry system in my 1990 Chevy K1500. The locks lock and unlock, the parking lights flash, and the horn honks. All the features that I wanted work. The panic button even works. The wiring was actually very simple once I found the correct wires. I used a Viper 211HV keyless entry module. Don't worry, I cleaned up the wiring after taking this video. The wiring in this video was just for testing and to show where everything needs to get connected.