Viper xv791 remote start problem

RS shouldn't work if your toggle is off.  one wire from the toggle switch should go to the neutral safety wire from the alarm and the other wire should go to ground.  it doesn't matter which one goes to which wire.

As for the cylinder ring for the bypass, i use a small zip tie to make sure it stays snug around the key cylinder.  i've never used a 555, just the 556 and that works for me.

if you can put the alarm into valet mode, then your valet switch is working.