1998 R R Cruse Control

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Hi I Have A Technical Question My Cruse Dont Work Light In Control Switch Dont Light. I Am A Technical Guy Myself ( Aircraft Maintenance Tech) I Have Troubleshot System Using R R Troubleshooting Guide And All Test Are Ok Up To Test 2d /3d This Is Wheare You Should Have 5 Volts At Pin 11 Of The C C Ecu With Ignition In #2 Position Test Reslts Is Zero Also Zero With Drive Wheels Turning Should Be 2.5 Volts Which Points To Yellow Wire Or ( B E C M ) Body Electrical Control The Wire Was Good All Other Systems To The Best Of My Knoledge On The B E C M Are Ok My Question Is Can The B E C M Be Defective On The Cruse Alone Also Do Anyone Know Why My C D Changer P N Prc9033 Has An Erreo Code And Do You Know If There Is Another Unit That Will Work In There Whild Retaining The Head Unit Sorry About Such Long Question