2002 Chevy Impala remote start

Need help. Installing Valet 552T Remote Start. Here's the info. Ground OK Constant/ All fuses Good Tach, got it (white at ignition coil) PURPLE / Wht of RS Programmed Tach wire by starting car and pressing Valet button until LED constant.. Starter Wire-Yellow, connected to Purple Constant 12V- Red, connected to Red Ignition One- Pink, connected to Pink Ignition 2- Green, coonected to Pink/Wht Acc-Orange, connected to Orange Brake Wire- White, connected to brown wire Testing before installing 555L module with KEY IN the Ignition, Remote Start lights up, then dies...Have installed previously same car, always tested connections with key in the ignition before 555L. Switched brains and remotes, still same problem. ANY ideas......

Did you power up the brown wire as an accessory? If powered as an ignition, the car will not run.

If the car doesn't crank at all it's usually the hood pin wire or the brake wire is grounded.If the car cranks but don't start it's a ignition wire not being fed or the bypass module not set up correctly.