How to remove the power amplifier - 2011 Lexus RX 350

Maybe a shorted speaker causing the power amplifier inside the radio to shut down or a speaker wire shorted to chassis and last the internal amplifier of the radio cd set faulty by itself... set volume to zero power it off take out the radio cd set; remove the speaker iso plug leaving the power plug only in and power it on if necesary turn again the volume down to zero and wait if it keeps turned on it a speaker problem if it shut itself off again then you go for a repair or a new one

Hi Toxey.

Does your trunk amplifier got power.
basically amp need remote power input it is coming from your radio.
please check when you turn on the radio remote power must turn on.
if no it is radio problem or wire is damaged itself.
please check the outputs,speakers with multimeter or single 1.5v cell.
if power is ok.and the remote on signal is ok your device still not working , it is the problem with power amplifier unit.

please check and let us know the status.
regards.
nuwan

see this steps and fix it God bless you
It is overheating due to power issues. Check your power ratings to be sure they match the amplifier's specifications. There is a problem with the amplifier. If the power ratings are correct, the amplifier needs to be sent to a service center.There is a problem in the sound system or wiring. Try swapping amplifiers or bypassing that amp. If the problem persists on the right channel on both amps, check the wiring and sound system. There is a problem with the amplifier. Replace the amplifier that displays the problem or send it to a service center .

Hi.

If there is popping sound and the fuse blows when the radio is flickering, then it is usually a short in the stereo wiring. The short results in excessive power draw and blows the main fuse. The radio must be removed to check the wiring behind. In some less common case the radio itself may be shorted inside becuse a defective PSU. If you have installed an amplifier check also that the problem is not the amplifier ordinary power draw, in that case the problem is fixed installing a capacitor in the amplifier power wiring.

For the XL - The AMP is located on the drivers side, behind the left rear trim panel.

1. Remove the cargo shelf. 2. Tumble the third row seats to the cargo position. 3. Remove the left body side window rear garnish molding.4. 4. Remove the left body side window forward garnish molding. 5. Remove the liftgate sill plate. 6. Remove the left rear door sill panel. 7. Remove the lower seat belt anchor bolt. 8. Remove the auxiliary power outlet from the trim panel. Release the five screws that retain the rear quarter trim panel to the body. 9. Remove the rear quarter trim panel from the vehicle.

If you don't have the XL then the AMP is located on the passenger side.
1. Remove the screw that retains the trim panel to the body. 2. Remove the cargo net retaining knobs. 3. Remove the bolt that retains the seat belt upper guide to the body. 4. Remove the rear upper quarter trim panel from the vehicle. 5. Remove the cargo shade/cover. 6. Remove the inflator access panel. 7. Remove the right rear quarter upper trim panel. 8. Remove the liftgate sill plate. 9. Remove the right rear door sill panel. 10. Remove the lower seat belt anchor bolt. 11. Release the retaining clips that retain the trim panel to the body. 12. Partially remove the trim panel in order to remove the inflator switch from the inflator bezel. 13. Remove the auxiliary air outlet washer and retaining nut. 14. Feed the auxiliary air outlet through the inflator bezel. 15. Remove the inflator bezel from the trim panel. 16. Disconnect the the 12-volt power supply electrical connector. 17. Remove the 12-volt power supply. . 18. Remove the trim panel from the vehicle. 19. Disconnect the electrical connectors from the radio speaker amplifier. 20. Remove the 4 bolts that retain the radio speaker amplifier to the body. 21. Remove the radio speaker amplifier from the body.

sounds the like the vehicle had an oem amplifier that was removed, most after market stereo installers will trace the speakers wires individually by continuity to by pass the factory amplifier and wire the new head unit to the vehicles speakers, if the harness has been spliced or factory amp removed, you will need to check if the amplifier still exists (usually under passenger rear seat sometimes located in trunk area) and see if the harness has been bypassed. if so you will have to reconnect the harness by color code in order to use the factory head unit

as long as it is audio out then you cant go wrong. same power from your stereo on you deck you get and will be dividing all the power like sharing each other. parallel connection is the best one . but not much as when you hooked it to an amplifier. auxiliary is different which is another option like adding more components to your car.

Radio 12v blue/yellow + radio harness
Radio Ground brown - radio harness
Radio Ignition gray + radio harness
Radio Illumination green + radio harness
Factory Amp Turn-on N/A
Power Antenna N/A
LF Speaker +/- pink - purple +,- radio harness or amplifier
RF Speaker +/- lt. green - blue +,- radio harness or amplifier
LR Speaker +/- black - yellow +,- radio harness or amplifier
RR Speaker +/- red - white +,- radio harness or amplifier

Notes: If equipped, the amplifier is on the passenger side rear cabin wall.

not all have amps.

SECTION 415-01: Audio Unit 2001 Focus Workshop Manual
REMOVAL AND INSTALLATION Subwoofer Amplifier Removal

1. Remove the subwoofer speaker. For additional information, refer to Section 415-03 .

8 screws

1. Remove the grill.

1. Remove the subwoofer amplifier cover retaining screws.

1. Disconnect the subwoofer amplifier electrical connectors.

1. Remove the subwoofer amplifier retaining screws.
   • Remove subwoofer amplifier.

You need to remove the plastics around the radio area, they simply pop off. Unhook the plugs connecting the buttons. Then you'll have access to the radio, they are simply bolted in. Once you remove the bolts, there's a harness that plugs into the back of the unit. Also note that the SC has an amplified system, meaning you can't just swap the radio unit out, you'll need to change the amplifier as well. Depending on the year of your SC, you'll probably need to change the speakers as well. Most likely the amp you'll be putting will have more power than the stock unit and will likely blow them out.