Ze2222

K i just finished relocating battery to truck and upgraded my alternator to a 3g. Vehicle is a 90 coupe 5 L stock. Do have an electric fan though.

My question is what is the accept parastic loss? I forgot to turn my ignition off once and it killed my battery thats fine but i deceided to check my parastic loss.

now i got .003 Amps, or .298 milliamps. Now i didn't know if that was acceptable or not i started pulling fuses to see. Well fuse 12 dropped it by .75 milla amps, and since well i heard alternators sometimes can drain the battery i unplugged my regulator and almost all of it went away. Went down to .001 amps. Now should i worry about this, should the alternator be drawning that? Any insight is greatly appreciated.

lafd5246

If you are not having problems, I wouldn't worry about it. All cars seem to have some form of constant draw on the battery (clocks, etc...) and any car will go dead when the ignition is left on. If you are having trouble keeping batteries or whatever, then maybe more diagnosing will be in order.

Ze2222

well the only reason i am asking is why does the alternator taking power when vehicle off? even though its 1.5 milla amps.

mjr46

.....how so is 298 milliamps not a problem??? it will drain a battery is a couple of days easy!!......25-50 milliamps is safe at rest spec

Joel5.0

.003 A = 3 mA = you're OK

lafd5246

I don't know the numbers of what is acceptable or not, I was just going by what he said about it has only drained once when he left the ignition on, and other than that no issues.

Joel5.0

298 mA = .298 A....... 25-50 mA = .025 - .050 A, again.... nothing to fix, provided the .003 A reading is correct.

mjr46

my bad......I read it wrong...speed reading ftl!!

Ze2222

thx again guys, yea i have a .003 drain. Just was curious learnin here