O.K., I've got an '02 Rodeo Sport (Hardtop) w/ stock Isuzu Power Locks & Keyless Entry, but the Keyless Entry Remote no longer locks or unlocks the rear tailgate. The Keyless Entry Remote operates the Driver's and Passenger's side doors just fine. No fuses are blown, new batteries in remote, and the code has been reset with the remote multiple times. Now, the only way to lock or unlock the rear tailgate is manual with the key.

If I manually turn the key to the LEFT in the tailgate, the tailgate is unlocked and the Parking Lights DO NOT flash when I lock/unlock w/ the remote (tailgate stays unlocked). If I turn the key to the RIGHT in the tailgate, the tailgate is locked and the Parking Lights flash when I lock/unlock w/ the remote (tailgate stays locked). This problem just started happening as I realized my tailgate was no longer locking w/ the remote when I left my SUV. Prior to a few days ago, EVERYTHING was operated by the Keyless Entry Remote... Any help would be great. THANKS!