I recently installed aftermarket heated seats in my 2014 Fusion Hybrid S. I installed Bussman Add A Circuit to two fuses in the interior fuse box. I tried a number of fuses which I thought would be off when the ignition key is not engaged, but all of the ones I tried were always active. Given the difficulty of accessing the fuses under the dash, I decided to take the risk and train myself to turn off the heated seats so as to not drain the battery down. Within 24 hours, I forgot to turn my heated seat off and was subsequently locked out of the car using the remote unlock. I was able to remove the key cover and get into the car. It started up without a problem as the battery wasn't completely dead.
So, I have a a few questions. Will the car basically go into a low power mode to prevent completely drawing down the battery? Second question, and probably more important, are there circuits that will shut down when the ignition key is not engaged?
Thanks in advance.