no power 12v to starter solenoid when ignition on starting position

Question by Guayuvin40 posted 3 months 2 weeks ago in 2000-2006 (E53)

2003 X5 E53 4.4i dash lights key on break light appears amber and turns red what it means. I have no power 12v to starter solenoid when ignition on start position, Battery ok can't find the relay for the starter location any where.  Starter is good tested. Brake switch good, fuses good, it happens during  the installation of  after market radio, Please help