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400 Series General Forum for the Volvo 440, 460 and 480 cars |
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440 Flat Batter (Again!)Views : 7581 Replies : 111Users Viewing This Thread : |
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Jan 8th, 2008, 16:01 | #31 |
Senior Member
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Here are the spec quickly
V D.C 200mV 2V 20V 200V 1000V V A.C 200mV 2V 20V 200V 700V A.a.c. A.d.c - 20uA 200uA 2mA 20mA 200mA 2A 10A Its a "Rapitest" DM25 |
Jan 8th, 2008, 16:26 | #32 |
Master Member
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Another common failure could be the startermotor itself or the relais on the starter is going south or a bad connection on the red cable running from the battery + to the starter. This also would cause the symptoms you discribed. If you can't find a drain from the battery check these.
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Jan 8th, 2008, 18:35 | #33 |
Senior Member
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Ok guy,
Ive got the meter, Now I need an idiots guide on how to use it! Here is a picture of what ive got. What setting must I use to test the voltage of the battery? Whats V~ and V -... etc? How do I check the drain on the battery? |
Jan 8th, 2008, 18:54 | #34 |
Senior Member
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OK, I know the DC and AC symbols now.
:P |
Jan 8th, 2008, 19:10 | #35 |
Forum Support Team
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Turn the control round till it reaches 20v
It should be on the V- which indicates direct voltage not alternating.
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Jan 8th, 2008, 19:14 | #36 |
Forum Support Team
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If you put the multimeter on to the battery pos to pos and neg to neg the battery should read over 12 volts. If reading over 12 volts the battery is not the fault.
Best of luck
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Jan 8th, 2008, 19:37 | #37 |
Senior Member
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I got home at 5:15pm and locked the car which is immboliser and siren etc etc.
Ive just tested the battery and it was reading 12.02V which im guessing is "OK" ish but we/I do not know as of yet how much current is been drawn. Started the car and the battery was reading 14.25v and did increase a bit when I increased the throttle. How do I now check the current been drawn? |
Jan 8th, 2008, 20:00 | #38 |
Forum Support Team
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Jan 8th, 2008, 20:08 | #39 |
Senior Member
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So I just set the meter to 10A and then put the black one on the neg on the battery and the red on the earth strap going under the battery?
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Jan 8th, 2008, 20:21 | #40 |
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Last Online: Aug 25th, 2016 14:11
Join Date: Aug 2006
Location: Chesterfield
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I would say that the battery showing 12.02V just after a run is too low. Car batteries are not actually a 12.0V source, they are around 12.6V depending on temperature.
this website is very in depth. Click through the links for the FAQ (7.1) and then click on section 4 - how do I test a battery. You will find a table in there, showing you the open circuit voltage, and how this corresponds to the state of your battery. 12.02V corresponds with about 25% state of charge - which is bad (obviously). To test the current being drawn (with everything off) turn the dial to the 10A DC position - circled in green and plug the left lead in to the 10A socket - also circled. With everything off, touch the red lead with the multimeter to bare metal earthed with the body, black to battery negative. This will let you know how much current is being drained. I warn you now - if there is something seriously wrong with a piece of eleccy kit on your car, and it is pulling more than 10A when you test, it may well smoke your new multimeter. I would also suggest you check in the manual that the symbols I have circled correlate correctly with what I have said, rather than just listening to what I have said, (and then hoping I buy you an early birthday present - I am skint at the moment and I have not used that type of multimeter before). test%20006%20%28Medium%29.jpg Last edited by jlgrosvenor; Jan 8th, 2008 at 20:25. |
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