OK according to your PM you have 12 sec delay feature and the other timer module functions are working. Just to refresh; with dome switch on 12 sec delay, dome light will stay on for that time after entering car and closing door unless ignition put on which will turn dome off immediately.
There is a brown relay (r12)on interior fuse panel which, IIRC, plays a role in this circuit. If you can touch the relay case when operating the door jamb switch it might tell you if it is working. Alternately, pull relay, apply 12 volts to coil and check contact resistance. Relay internals are shown on case.
