2011 Honda Accord Coupe, Shorted Out Alarm

Ok so i reinstalled the stock head unit and ...... nothing. I got no stereo no navigation screen no climate control screen no alarm no key fob no courtesy light when you open the door. Door locks work trunk light works. Any ideas?daren obrecht

ok so i reinstalled the stock unit and plugged back in the navigation dvd the onboard amp and the bluetooth. and i got nothing . none ofwhat wasnt working is working.daren obrecht

turn the vehicle switch to the ON position; use your multimeter to check for voltage and ground on the Gray 24 Pin Connector coming from the vehicle that connects into the radio by putting the negative probe to Pin #12 and the positive probe to Pin #24, is there voltage?

Constant power is a white wire, it is at pin 24. The switched wire is violet in color. It is located at pin 14. At least one of the 2 above listed wires do not have 12 volts on them. Let us know which wire does or does not read 12 volts with the key in the accessory or on position. It will be much easier to use the radio chassis for your meter's negative lead.

Will do this as soon as i get home from work. Thank you.daren obrecht

Ok. The purple wire has 12 volts. The white wire does not have 12 volts.daren obrecht

could you remove and re-check Fuse #15 from the engine fuse box. Fuse #15 provides constant power to the White wire at Pin 24. Edit: Fuse #15 is 10 Amps and is labeled as "BACK UP"

Ok so i recheck the fuse .... looks good check for continuity .... meter beeps. But i throw in a new fuse from the spares anyways ...... and it works. Only thing that didnt is i cant put the code in for the radio. So i dont know if the actual radio is working or not. But since im replacing it anyways it probably isnt important. Would the stock radio have its own internal fuse?daren obrecht

for clarification, what you mean is that the following components are now working: navigation, climate control screen, key fob, alarm system except the radio? i wouldn't know if the stock radio has a fuse inside.

Yes all the previously mentioned features were not and are now working. The stock radio takes a code to be able to use if power is removed . But i can take it from here i believe. Thanks for everything.daren obrecht