Blown switched ignition fuse, where to look?
 

I accidentaily touched my remote turn on wire from the radio (for subwoofers, etc.) to the frame while the car was on, and it blew a fuse or something.

Thing is, I checked all of my fuses - I couldn't find one blown fuse. Is there something I'm missing? I'm frustrated to the point I want to drive the car to the dealership and pay to have it fixed.

Check your head unit fuse, and if the radio still will not power on check the radio fuse under the dash. Did you check to see if your still getting power to the head unit? Is it powering on?

I don't have a head-unit per-se; I have a CarPC with a PC mounted in the trunk, and a Monitor where the head unit would be.

My ignition turn on wire feeds 5 devices: My wideband gauge, my monitor, my subwoofer amp, my 4channel amp, and my car computer. The reason it blew out was because I drove around with the subwoofer amp's turn on wire exposed, and it touched the frame.

I heard a click, and then all those electronics turned off. I know that the individual fuses to each device didn't blow, because my wideband did a closing ceremony, indicating that it still had +12 power, but it lost the ignition signal.

I checked all of the fuse boxes, though, and I can't find anything!

all three fuse boxes?

Yep, all three, including the vertically mounted one.

the power supply still working on your car pc? may have flipped the fuse on that ( i know a few powersupplies have a built in fuse.)

That's a big no no! That many devices you should have a relay setup!!!.

Just checked it, it looks all good from here. I also checked the amp fuses, and the monitor fuse, and it's all good.

Haha, I told myself that too. I don't think it's drawing lots of current though, since it's a signal wire, not the main +12 rail. I use a distribution block in the car for the 5 devices, and they are fed from the battery with 2GA wire.

:shakes head: :shakes head: :shakes head:

I'm so dumb.

The audio fuse was blown and I didn't see it, 4 times.

Thanks guys. :tup:

How are you checking your fuses? If you missed it 4x, I'm guessing you were using a visual check which, as you have discovered, doesn't always work so well. Invest in a multimeter (VOM) or test light. You can find cheap meters for $10-20 or so and a test light ought to be half that. It will save a lot of :shakes head:s next time.

That's actually how I found it - I used my multimeter. I was too impatient and didn't feel like finding one of my 5 harbor freight multimeters they give away for free.

Chalk that up to laziness!

Been there. Done that. Carry on. ;)

I actually did the same thing this spring. Then you scare yourself thinking something is really fried. haha.