Pls help, it was working before

my civic got a kenwood deck i took it out

and idk my friend wanted to test another deck that has a different plug. My current plug wont plug up to his deck so he plugged pins into the red and yellow for power up his deck he had and chassis ground.

That deck didn't work and i don't know if it even had good connection inside the plug. idk if the yellow/red wire or ground got connected or what together or what. I didn't want to cut my wires so he said its fine to test it by sticking the pin inside and connecting it with his soldered wires...

i then put back my own kenwood deck and now it don't even power up or light up. note- took face plate off the even red blinking light don't work.

Please help me honda tech what do i check i checked the radio cigarette lighter fuse but it looks good...What to do????

 

test to see if there is power running to the yellow wire with the car off and the red one with acc on and make sure ur fuse is ok just change it for a new one even if its ok

 

thanks i checked the other fuse under the hood the brown one was blown 7.5 fuse..