JEEP CHEROKEE KEYLESS ENTRY

My Brother Has A 2002 Jeep Cherokee Overland. Recently, His Keyless Entry Stopped Working So He Changed Batteries In Both The Remotes....

I Have Replaced The Batteries In The Keyless Entry And It Is Not Working. What Am I Doing Wrong?

My Car Is Not Cranking. The Battery, Starter And Altaner Has Been Tested. I Also Notice That My Keyless Entry Is Not Working As Well. What...