I'm having a issue with our 1998 dodge ram 1500 4x4 V6, it started when I disconnected the battery to put it in a jeep, I reconnected the same battery back into the dodge to find the alarm lights flashing with no sound and now the pickup won't start or even turn over.. is there a security code or feature I wasn't informed with? I read and read and read the owners Manuel to find out how to fix it, but it ain't got anything for replacing the battery and putting in a code afterward? Solution? Help!!

did you disconnect battery ? bet you did ! you need to reset anti-theft ,disconnect battery again but first open drivers side window all the way and keep keys in your hand (auto locks may lock doors )reconnect battery when lights and horne go off put key in drivers door and turn open lock open lock 3 times that should reset it.

probley need to be reprogramed from the dealer lost key code in memory

There are two types of alarm that was put in for Dodge and Chrysler depending what type you have I will give you the easy defeat.But first The BCM (Body control moduel) goes crazy why dont you try this method first. Roll down the window. Put the key in the ignition .Disconnect the battery negative post and positive and put them together for 2 minutes, then reconnect the positive first then the neagative.Then turn the key to the ACC position but do not crank the engine. leave for two minutes. Then see if that start the vehicle. I

hold the key in starting position till it starts could take a min

insert key turn to on position alarm should silence
once bat conected start truck

disconnect your negative battery terminal from your battery for thirty seconds.....make sure your sensor is plugged back in, then reconnect your battery terminal.That will do the trick unless you have another issue with your vehicle.I hope I could help..HAPPY HOLIDAYS!!!

Before you disable your alarm try this, disconnect the alternator field plug over night, check battery voltage at the battery before you disconnect the plug then disconnect and leave alone over night, make sure you have at least 12 volts when you disconnect the alt.
Recheck battery voltage in the morning before you reconnect the field plug...

I suspect you may have a leaking diode in your alternator's internal regulator, have seen it many times on your model... Certainly worth a try. Let me know how it turns out....

remove oil pan from engine..oil pump is bolted to rear main bearing cap of engine..pickup tube may be plugged if you're having an oil pressure issue

Check if you can if it doesn't have some kind of alarm system that locks out when battery disconnected.(owners manual, or where you bought the vehicle), then I'd check all the fuses, starting with any under the hood to see if maybe one of those blew when hooking up new battery.

was your battery disconnected and reconnected the ecu.if not its possible that you fried the ecu.