brian72
Early Bronco Student
- Joined
- Jun 18, 2001
- Messages
- 4,157
I have a yellow optima - I got my starter and alt from rrraaayyyy22
I have not driven it for a couple weeks and it was hard to start. Needed a jump. Drove it for a while and the next day it was hard to start but it did. It ran for about 30 min and then sat for 2 more days...needed another jump. Did some searching and found other similar battery, charging issues; so I took some measurements.
Took the neg cable off - hooked up test light to cable then touched light to neg battery post and the light did not light up....that would test for drain right?
anything else to check and measure....What does the above tell us?
How to measure if alt is good?
I have not driven it for a couple weeks and it was hard to start. Needed a jump. Drove it for a while and the next day it was hard to start but it did. It ran for about 30 min and then sat for 2 more days...needed another jump. Did some searching and found other similar battery, charging issues; so I took some measurements.
- Before trying to crank - 12.8
- tried cranking and basically dead sounding - the voltmeter was now going up to 14.29
- Went to have dinner
- After dinner the reading was 12.76
- During cranking I was seeing the voltmeter in the 3.0-4.0 range
- Jumped the truck
- Running with light on - 14.45
- Running w/o lights - 16-17
- turned truck off - holding steady at 15.23
- measure 2 hours later - 13.8
Took the neg cable off - hooked up test light to cable then touched light to neg battery post and the light did not light up....that would test for drain right?
anything else to check and measure....What does the above tell us?
How to measure if alt is good?
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