What year make and model

Bi directional scan will set and relearn the com and crank wish you the best

Scan tool

Depending on the year ram, you may be able to unhook the lightning box and ground
out the volts of the nodules to force the relearn. Start with getting the sad - side off and
out of the way then disconnect the happy + side and ground it to the neg - post with a
wrench if it doesn't reach for a few mins to drain the power from the modules.