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Way too much info and obviously too much time on my hands
Diy notes
FIRST STEP
Test battery with a full charge, (150 amp charger for 15 mins, if you do not have access to a commercial charger then the 15 amp diy one over a 12 hr period) follow up with a 150/ 200 amp load test, as anything below 12 v is 80% drained. This full load test should be 1/2 cold cranking rating of the battery at zero degrees, approx 150-200 amps.
As batteries fail, they cause all types of issues.see the multiple posting on diagnostic charging system testing and battery testing. I have posted it approx 15 times now
Note two
As batteries fail they will absorb all the energy a charging system can provide, but they never hold the charge. When loaded with a carbon pile tester, the voltage just drops to 9.xx volts. You can NOT TEST a charging system with a bad battery in the loop.
End of shop class 101
Helpful?
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2005 X5 4.8IS
The Blue ones are always FASTER....
Current Garage:
2005 X5 4.8is
2002 M5 TiSilver
2003 525iT
1998 528i
Former Garage Stable Highlights
2004 325XiT Sport
1973 De Tomaso Pantera, L Model
1970 Dodge Challenger T/A 4 sp Alpine White
1970 Dodge Challenger T/A 4 sp GoManGo Green
1971 Dart Sport, “Dart Light” package
1969 Road Runner 383
1968 Ply Barracuda 340S FB Sea-foam Green
Last edited by StephenVA; 12-04-2019 at 06:15 PM.
Reason: fat fingers and added Battery chart
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