Hi, I went out yesterday evening , and tried to open my car with my clicker as I usually do , it didnt work. I change the battery thinking it may have been the battery but it still will not open it

try reprogramming the remotes you have, cycle the key quickly 7 or 8 times ending in run the locks will cycle on the last key cycle to let you know that its in programming mode. click a button on each remote you have and turn the key off. You may have to do it several times to end the key cycle in the run position and it may take up to 10 key cycles to get it to go into programming mode. after all that try the remote again. If it never goes into programming mode there is something goofy with the alarm system, if it doesn't accept the remote it may just be a bad remote. places like autozone, advance, etc that sell remotes have a tester that you can put the remote against and press the buttons, it will indicate that there is or isn't a signal being generated by the remote and if it's actually bad. Last but not least, Is the battery in correctly? I've had customers come in swearing that they need a new remote because their ??? said that they did after a battery change and it was upside down.