Q: How to remove the antenna cable on Scion tC?
A: A proper antenna cable removal involves disconnecting it from the negative battery terminal for at least 90 seconds which prevents Air Bag and seat belt pretensioner activation. Next, remove the tonneau cover assembly, deck board sub-assembly, back door scuff plate, deck floor box LH, deck floor box RH, rope hook assembly, rear No. 1 floor board, seat track bracket cover outer RH, seat track bracket cover inner RH, front seat assembly RH, rear seat cushion assembly, rear seatback assembly RH, lap belt outer anchor cover, front seat outer belt assembly RH, front door scuff plate RH, No. 1 luggage compartment trim hook, No. 1 side trim assembly RH, No. 2 luggage compartment trim hook, deck trim side panel assembly RH, shift lever knob sub-assembly (for Manual Transaxle), upper console panel, console upper rear panel sub-assembly, console box rear assembly, instrument cluster finish panel assembly, and finally, the antenna cord sub-assembly by removing the bolt and detaching all clamps.