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reinstalled radio o3 s,now power but no sound

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i had changed battery and blew fuse on back of radio.took it out put 10amp fuse,now all lights stations come on,but no sound.any ideas.i see its a common issue.ive checked fuses for radio,dont see one for amp.shoud i check amp itself,if so how doi get to fuse

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OK. You need to understand that doing this often results in some significant damage to the entire electrical system beyond the odd blown fuse; blown relays, non functional computers, and dead alternators are not uncommon, as is burnt wiring. You are going to need to start check the entire electrical system. Do you have access to a Durametric software tool?

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no,ill have it scanned,but everything else works fine .

The Durametric system can see and actually test most of the systems on the car in real time, so it is a great time saver when diagnosing electrical problems.I would start with a simple multimeter and test the radio power circuits at the back of the radio to make sure you are getting power there.
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There might be a TSB for this problem...

"Sound failure occurs sporadically (no sound playback of PCM2 during radio or navigation operation) on vehicles from MY '03 and MY '04 with the equipment mentioned above, which were manufactured up to the introduction date mentioned below. In the event of a complaint, the software of the BOSE amplifier must be updated using the CD "BOSE Update-CD 2003-2; 911 & Boxster", part number, 000043205 50."

"The current version of the BOSE amplifier software can be displayed in the PCM2 display as follows:

After switching the PCM2 on, press and hold the SET button (Figure 1, Item 19), then press the "FM-AM"- (Figure 1, Item 1) and the "AUDIO" button (Figure 1, Item 10) at the same time. The Service menu is shown in the display. Select the "SW versions" function by turning the right rotary knob (Figure 1, Item 17) and confirm by pressing the right rotary knob (Figure 1, Item 17).

Depending on the software, the following version is shown in the display under "amplifier":

"00011927" (or lower):The software matches the amplifier software version for vehicles from MY '03 or MY'04 up to the introduction date.=> Perform an update as is described in Item 2.

"00011929":The software matches the amplifier software version for vehicles from MY'04 as of theintroduction date.=> An update is not necessary."


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not quite sure how to do that.i havent taken amp out before,does it have a fuse,and how do you access power cord to amp?

There should be a wiring harness going to the amp that has both a switched power wire (blue I think, and hot when the radio is on)and a ground (brown). There should also be a second harness that is the signal from the radio and output going to the speakers. Not sure if the amp itself is fused or if it shares a circuit with something else.
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i spoke to porsche,they suggested i look for fuse in fuse panel for amp.they werent sure which one it was,told me they would help me find it if i bring car in.may be a while before i have time.anyone know which fuse is for amplifier on 03 s in fuse box.amp also may have an internal fuse.

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