It is in the owner's manual, it's not just on & off, it's a combination of on & off along with hitting the power lock button on the driver's door. Apologies if you already know this. It's not clear by your reference that you are doing anything more than just cycling the key on and off. You don't need a service manual, just an owner's manual.
Originally Posted by voyager1993
I don't remember the exact procedure from the 2nd gen, but IIRC it is essentially unchanged between that vehicle and the 4th generation. The biggest difference might be that in the 2nd gen, the horn beeps, or the locks lock to tell you you are done, and on the 4th generation, there is a chime. The first three steps for the 4th gen are as follows:
1. Close all doors and place the key in the ignition switch.After that, as I mentioned above, there is some kind of indicator that you were successful (either the lock actuates or the horn beeps, I can't remember which). On the 4th gen it's a chime, but I don't remember it being the chime on my '95.
2. Cycle the ignition switch ON/OFF four times ending in the OFF position. (do not start the engine)
3. Within 10 seconds of the final cycle, press the interior driver’s door lock switch to the LOCK position.
Hope this helps.
2005 Dodge Grand Caravan SXT, 129K mi.
Former owner of:
1988 Dodge Caravan SE, 2.5L I4 (1988-1995, 99K mi); 1995 Plymouth Grand Voyager SE "Rallye", 3.3L (1995-2004, 169K mi); 2003 Grand Caravan Sport, 3.8L, (2004-2008, 106K mi), 2008 Nissan Quest, (2008-2010, 25K mi)
2008 Lexus RX400h (Dark Gray), 112K mi; 2005 Hyundai Elantra GT (Blue), 89K mi