Battery drain
09-19-2018, 04:21 PM
#1
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Battery drain
2003 f 150 4.6 38000 mi. starter drags and bearly starts after sitting all night. Battery and alternator checked out fine. If it’s been running it starts right up.
09-19-2018, 08:16 PM
#2
Driving the wheels offer
yep, sounds like a battery drain or weak battery
09-19-2018, 08:27 PM
#3
Check voltage when you park it at night and then again before starting in the morning. Hopefully you have a digital volt meter for an accurate comparison.
09-20-2018, 01:34 PM
#4
Senior Member
Perform a parasitic draw test on it. You'll know if you've got a circuit draining the battery.
Here is a good explanation of how to do it, and what to look for.
https://www.ericthecarguy.com/faq/so...c-draw-testing
Here is a good explanation of how to do it, and what to look for.
https://www.ericthecarguy.com/faq/so...c-draw-testing
09-20-2018, 03:08 PM
#5
What White said. You can also use a test light instead of a meter. You will always have a dim light because of memory draws but if it is real bright, start pulling fuses and narrowing it down.