Need some help figuring out what went wrong with the power door locks on my 1999 EX. All three passenger door locks stopped working with the remote. At first they would work once a day (usually on cold mornings). Now they don’t work at all. I can’t imaging all three locks went out together in the same way though I’m sure it’s possible. I did install a new radio and back up cam about a month or 2 before this started. Tapped into the reverse light for the rear view cam to activate. Could it be related?
The drivers side front lock still works fine both unlocking and locking with the remote. The switch on the inside door handle has not worked since I got it. Any thoughts or a recommended diagnostic?