[align=left]Hi i am new here a coulple of weeks ago i went to install an aftermarket cd player in my 2003 honda civic ex and i did something wrong and all power went out like say the dome lights and the cd player the keyless entry the chime when the head lights are left on, it all works when the car is on just doesnt work when it is off the guy i had install my cd player after i messed it up said i blew a relay does anyone know which relay that is a pic or just the location of it would be great unless you can think of another possible reason thanks in advance[/align]

 

You might have blown a fuse. There is a fuse box under the driver's side dash, check all the fuses in there. Also make sure your wiring is OK because i think you caused a short circuit when you initially wired it.

 

also note, your generation of car generally requires the factory radio to be intact for keyless entry/power door locks to work properly

old generations do not have this requirement

 

well i checked all fuses allready and changed most of them too and i asked a honda dealer in the service dept and he said that the factory radio doesnt have anything to do with it and the guy at the stereo shop had a tester and said it was a relay but doesnt know which relay

 

i really hate that it dont work i wish i could just figure it out

 

i think i have the same problem as you in my 2002 civix lx. one day while i was driving, the power to my aftermarket head unit just went out. then when i took it out to check the wiring, the power locks and keyless entry stopped working. the power locks only work now when the car is on. the dome light also doesnt turn on anymore when i open the door or take the key out of the ignition. i checked the wiring and checked and replaced the fuses for both the radio and the power locks,i also re-checked the wiring and they doesnt seem to be a short circuit

 

nevermind i figured it out, the 10A "Back Up" fuse in the fuse box in the engine bay needed to be replaced

 

Bnguyen...thank so much for posting about the backup fuse...I just did this all today and was gonna pull it all back out again in the morning until I saw that. Ran down, checked it, and it was blown. Thank you so much!