2008 Police Interceptor battery drain

This car which I use as a taxi has a parasitic drain on the battery even when all my taxi radios, credit card processor, etc. equipment is disconnected. I swithched out the LCM to another used one and the problem persists. It's OK for about 12 hours but drains the (new) battery to death in 18 hours. I measured the drain at 225 ma. Anyone else have this problem?

Check to see if a wire was caught between metal parts if anything was changed lately; starter, alternator. It is easy to catch wires when you get in a hurry. I had one a few years back where the shop who replaced the starter caught a wire between the starter and block. It had a slow 18 to 24 drain. Also, if any lights were added could do the same thing.

Thank you jdmeaux.

Try this also, park your car as you normally would, and then later on that night, go out and look for any illumination you might not see during the day or sounds you might not hear during working hours, just a suggestion. I used to repair lift cranes and was dispatched to a busy work site to repair a crane that the battery was going dead. at the end of the day when every body was gone the work site was quiet and I heard a motor noise, turns out it was an over head wiper motor with no wiper blade on it. Very stealthy during the day. Come to find out The idiot crane operator turned it on to run the battery down so that he would not have to operate the crane and still getting paid while the crane was being worked on. I know the Vic is not a crane but still it could help.

Ceptor 1,
I suspected something similar because once when the battery failed the headlights pulsed two or three times. Incompletely uninstalled anti theft or police equipment? Bad LCM? Also the dome light does not operate when the doors are opened although the door switches operate the door ajar dash light.

There are numerous videos on you tube under battery drain tests. I used to do these all the time and loved it The easiest way is to get a clamp on meter put it on the positive batt cable set it to amps normal draw with pcm memory,radio memory,stereo memory,varies if i remember right less than an amp is normal you should see your draw on the meter have a helper watch the meter start pulling fuses have your helper yell when the amps drop.If your dome light normaly comes on when you open the door this will show on the meter as well also the trunk or hood light I would pull that fuse first., alot of times its the stereo. We had an ambulance at the fire dept that would drain a battery in a short time. It turned out to be one of the two way radios the radio worked fine until turned off it would draw 6 amps. So you may want to pull power from them as well if they are trunk mount radios pull power from the control head as well when you pull radio power.I prefer to do this with a regular multi meter its more complicated but i think it works better Let me know how you make out Walt

Thanks Woody.