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I drive a 2013 Honda Civic coupe lx

I did something stupid. I put in a remote turn on wire using a “tap a fuse”. I put it in fuse 19 location. I think I put it in upside down basically bypassing the fuse. I was putting in an amp and running new speaker wires. I found a grounded speaker wire that I believe caused my radio to go black.

I now have a problem with no accessory power at pin 23 on my radio harness connector. I pulled out the tap a fuse and put the fuse in like normal. Fuse 19 is not blown. When I pulled the fuse I do have 12 volts on one side of the fuse.

Looking for some help what might be bad? Does anyone know what is between fuse 19 and pin 23 of the radio harness. I still don’t understand what exactly switches the accessory power on when you turn the ignition key. Anyone have an electrical schematic of this circuit?

I’m thinking maybe a relay coil got blown but I don’t know which one it would be if it indeed exists. I don’t think it is burnt wiring because I never smelled any electrical burning.

Thanks for any help.

 
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fuse is blown

 
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I checked the fuse block with the fuse removed. I believe only getting voltage on one side is correct. I have checked the fuse multiple times with my multimeter and I always get 0 ohms. So when the fuse is in place I’m sure the voltage is on both sides.

After further research I believe it might be the ACC SKT relay but I don’t know where it is located. Can anyone help with it’s location?

 
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Oh ok. I can't read.
I don't normally pull fuses to check them, I simply touch a basic 12v test light to both of the exposed contacts on top of the fuses. If the test light lights up on only one of the two, the fuse is open circuit (blown).

Here's what I see:
The power source for fuse B19 (7.5a) comes from the ACC leg of the ignition switch. Probsbly not an issue since you have 12v on one side of the B19 fuse socket.
Power from dash fusebox B19 (7.5a) goes thru 2 junction boxes (their function is similar to multiple splice packs) before it reaches the radio terminal A24. Purple wire.
They are buried in the dash. I think i remember seeing one above the gas pedal area but I'm not positive of that. Those junction boxes will have many wires of different colors.

The 2 accessory socket relays are only for the 12v power outlet(s), not the radio.
The coils of both relays share the same B19 fuse but the way the diagram is drawn the power to the radio is completely unaffected by the accessory socket relays.

DO TEST both of the 12v power outlets since they share the fuse. That may be helpful info.

 
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WOW!!! Thanks for the great info!!!

I hear you about the test light. I don’t have one of those but I do have a digital multimeter. My test leads for the meter are a little too big for contact with the fuse installed.

I do have power at my front console power outlet. I can’t find another one. I’m thinking maybe the coupes only have one. I’m going to pull out the radio again and check the harness that goes to it. Those pins are tiny and maybe my test lead wasn’t making contact. If I have 12v accessory power on the connector then maybe I just fried my radio.

You mentioned Pin 24. I scoured the internet and found a diagram for the connector. According to it the ACC 12v is on pin 23. I am attaching a pic of the diagram I have. Remember I have a 2013 coupe lx so it does not have premium sound. Can you confirm if the connector diagram is correct for my vehicle?
Again thanks for all your help.

 
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Not sure what was going on but my radio just started working in the middle of driving one day. Not sure why it came back to life. Maybe it just needed a rest. Thanks for everyone’s help on the issue.

 
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In the diagrams I noticed this was a difference between coupe and sedan.
No clue why it's different though.