We're in the process of purchasing a '99 Forester. It has the electric door locks with the remote lock/unlock module. One of the modules needed a new battery but apparently needs to be re-programmed to work. Anyone know how to do that?

Hi Ed, try here for all your remote entry needs

http://www.cars101.com/subaru/keyless.html

 

 

Hope this helps.

I do think you will need to find the

service button up under the dash.

If the remote was already programmed to the vehicle (was working previous to the remote's battery replacement), then it could be this (from endwrench), though it's not for 99 forester...:

 

Keyless Entry Battery Replacement

After replacing the keyless entry transmitter battery on 1999-2001 Legacy models and 2001 Forester models, the transmitter must be re-synchronized with the vehicle. To re-synchronize the system, simply press either transmitter button (Lock/Arm or Unlock/Disarm) six times.