Ignition switch relay

it's in the under hood fuse block. It should have a diagram on underside cover of fuse block.

Hi here is a diagram of your PDC

Please let us know what you find

Does anyone have a wiring diagram for the 2003 Cadillac CTS ignition?

before we send a diagram what exactly is wrong with your car? won't start? try security reset first. or tell us what problem you are experiencing.

Security test done 30 minute learned done starter, starter relay checked switch, checked no start, no crank, but security light goes out. I notice the switch is hot which leads to a negative ground or broken wire.

it might be a bad switch too as they go bad.what I'm sending is what we have which is part of engine performance yellow wire is crank and pink is to coils. It could also be a bad connection in fuse box under the hood.