Hey
I have a 99 civic ex coupe 5spd
I bought the car this way, previous owner said the power locks stopped working after he installed the aftermarket radio.
I can still lock/unlock the doors individually with the key or individually with the levers on the doors.
When I try to unlock/lock with the fob the lights flash and I can hear a click inside both doors, but nothing changes with the locks or levers on the doors.
Also, when i lock the driver door from inside with the lever I hear a click in the passenger door, but again, nothing has changed.

I read that removing the factory radio could cause a loss of keyless entry up to 1998 but(if done properly) should not in a 1999 or later. Is this true?
I also read problems with power locks sometimes affect the dome light, but my dome light and other electronics still work.
Before I start taking the radio out and door panels off, any ideas of where I should look first?

 

Here is the electrical diagram. According to this, the radio should not interfere with the door locks.

 

To start, check the fuses in the diagram.

 

Thanks for the diagram, should make things easier!

 

Factory 5 speed or converted auto?

 

factory 5spd

 

Found this as well. Hope it helps.

 

Thanks, that does help.
I checked the fuses today and they're good

 

Did the previous owner happen to change the speakers as well?