Amp Draw on Car Battery
Amp Draw on Car Battery
(OP)
Hi everyone,
I have been trying to measure the amp draw on my car battery when the vehicle is off. When I unhook the negative lead and measure the amp draw from this, I initially get a reading of 1.9amps with my multimeter. However, after about 10-15 seconds this amp draw quickly drops to approximately 0.04 amps. Not being very electrically inclined I am not sure what to think of this, but I am trying to determine whether there is a parasitic amperage draw on my battery so the difference between these two readings is critical. Does anyone have any thoughts?
Renee
I have been trying to measure the amp draw on my car battery when the vehicle is off. When I unhook the negative lead and measure the amp draw from this, I initially get a reading of 1.9amps with my multimeter. However, after about 10-15 seconds this amp draw quickly drops to approximately 0.04 amps. Not being very electrically inclined I am not sure what to think of this, but I am trying to determine whether there is a parasitic amperage draw on my battery so the difference between these two readings is critical. Does anyone have any thoughts?
Renee





RE: Amp Draw on Car Battery
Probably capacitors. Put a voltmeter across the leads and see if the voltage is maintained for a while after the terminal is disconnected from the battery. It may not show up if the caps are charged via diodes. In that case, pull the fuses from any control modules and see if the same thing happens.The later explanations make sense, but you can still pull fuses to see which components are active.
RE: Amp Draw on Car Battery
RE: Amp Draw on Car Battery
It's a wonder a car battery can stay charged anymore.
RE: Amp Draw on Car Battery
Dan - Owner
http://www.Hi-TecDesigns.com
RE: Amp Draw on Car Battery
RE: Amp Draw on Car Battery
RE: Amp Draw on Car Battery
Keith Cress
kcress - http://www.flaminsystems.com