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AMP won’t shut off even when vehicle is off. Fire? Please help no where to turn.
I know this has been discussed before because I read forum, but this particular issue hasn’t been discussed. 2002 SC430. Installed after mart deck (Bluetooth for screen, nothing fancy). It was okay for maybe 5-6 days the one day I hear the amp fan going. It’s really loud, never heard it like this before. Then sound cut out. It has been intermittently working but now stopped completely. HOWEVER the issue I’m running in to the amp keeps running even when vehicle is off. This is hour #17 and the fan is still going. I’m worried it’s going to overheat and cause fire. I removed battery and amp fan is still going!!!’ WTF, is it pulling power off? I’m out at my beach house over 7h from closest lexus dealership. I’m in process off removing amp myself and could use help/guidance. I’ve stripped most the trunk.
Last edited by Sky430; 07-20-22 at 06:33 PM.
Reason: Photos. 100% sound is coming from amp. I have no clue how to take it appart
The only suggestion I can think of is to consider pulling fuses 19, 24 and 47 which list Audio to see if that stops the noise.
Fuse 19 is in passenger side fuse panel, second from bottom on left column
Fuse 24 is in the same panel, third from bottom in center column
Fuse 47 is in the engine compartment, in the long box with two rows of small and large fuses, in the row with more small fuses, eighth counting from the side with fuse pull tool.
Double-check fuse numbers and locations in your model year manual (get pdf online).
Let me get this straight. You removed the cars battery, disconnected it or whatever and your fan inside the amp is still running? This is quite impossible. It should be a matter of seconds before the amp power supply exhaust any stored power in the capacitors.
That's what I thought too, but without being there it's hard to tell what exactly had been disconnected. Another possibility is that is some ambient noise, maybe beach house AC running.
let me get this straight. You removed the cars battery, disconnected it or whatever and your fan inside the amp is still running? This is quite impossible. It should be a matter of seconds before the amp power supply exhaust any stored power in the capacitors.
That's what I thought too, but without being there it's hard to tell what exactly had been disconnected. Another possibility is that is some ambient noise, maybe beach house AC running.
I installed a weird Japanese aftermarket deck and that’s the only thing I can imagine it’s drawing power from.
I really wish to impress here, if you disconnect the leads from the car battery, there is no other known OEM source for power. There is no 12vdc.
With that said, so I don't come off as a completely arrogant ***, could the aftermarket unit have an internal battery? Stores all the settings. "IF" the amp is wired incorrectly, It COULD be drawing power that way. And I'll just leave it at that.
It’s not impossible. I have a cheap China made car stereo that I’m now using for my bathroom music during the morning shower. The very same thing happened when I turn off the power source, the music still going for another 5-10 minutes before it’s completely off. I never opened the unit to see the internal components but I guess it must have some kind of battery or capacitor to retain power. Weird but it is what it is.
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You need to unbolt the pull-out cover for where the roof sits. Remove the small caps on each end of the bar which holds the cover and you will find two 10mm nuts. Remove the nuts and pull out the whole cover assembly. If you have very small hands you may be able to reach the connections for the amplifier which face the rear seat bulkhead.
If not, you will have to unbolt the various metal brackets that hold the amp in and then you can get at the connections. Pain in the butt, I know. However, I think the problem lies with that cheap head unit you installed.
Are you disconnecting both battery terminals? If you do this then no power can get to any system withing the vehicle. Any capacitors should drain within minutes.
07-20-22, 06:12 PM
AMP won’t shut off even when vehicle is off. Fire? Please help no where to turn.
