How to search for battery drain

You can disconnect the neg batt cable, and place a test light in between the cable end, and batt terminal, watch licht as you pull every fuse. when the light goes off, or dratically dim when you pull the fuse, it means the draw is on that circuit. this saves me a lot of time, neat trick i think.

Don't use a test light. That method only works on cars old enough to be in the junk yard. You MUST use a digital volt meter which is capable of at least a 10 amp current draw. To begin, first set your meter to a DC voltage scale and measure the battery's votage at rest. Put your red probe on the red positive lead and your black lead to the negative post of the battery. Your battery should measure 12 volts or higher. If it doesn't then you must first charge your battery. If the battery won't stay over 12 volts after charging it, then replace the battery. Secondly, start the vehicle and measure the voltage at the battery again. The reading should be about 13 to 14 volts. If it is, then your alternator is charging the battery. If it isn't, then your alt. needs repairing. Set your meter on its DC amperage scale and move your meter's test leads to the correct ports in the meter. Check your owner's manual for the meter if you have one. With the ignition off, disconnect the negative battery terminal. Close all doors on the car. Place one meter lead on the negative battery post and the other attach to the negative battery cable. You should get a reading on your meter. To confirm everything is testing correctly, open a door and the reading on the meter should rise and the interior light should come on. Make sure the dome light switch is set to activate the light if the door is opened. Close the door and watch the meter for at least 20 to 30 minutes. The reading should not be above 50 ma. Depending on your meter the displayed number may be 0.05 amps which is 50 ma. This is the accepted maximum limit a car should draw at rest. if the draw is higher, then start pulling fuses out of every fuse box, one at a time to identify which one causes the meter reading to drop. Post your results for members to help.sparky