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Topic: Charging Question (Read 770 times) |
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Mike H
Senior Member
Renault Clio
  
Posts: 2594
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Charging Question
« on: Dec 6th, 2012, 1:50pm » |
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on Jan 12th, 2007, 10:08pm, ghia-x wrote:ALT test, with engine running alt should be putting out 12.5 -13.0 volts @ tickover raise the revs to 2k & check readings. upto max 14.70 volts. Any more alt overcharging.
. . .
Around 13.60 volts ideal. 
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Lately mine has been 11.8 - 13.00, depending what it feels like at that moment.
Did a trip this morning, started with 12.5 - 6, 25m out, 13.1 - dropping to 12.9 while I watched it, 25m back home, parked, before turning engine off, back to 12.00!
All tests by dashboard diag, engine idling.
This has been developing for some time I think, but have only recently been monitoring it on the dash diag., so don't know what it was doing before. Have also seen it jump from a low V to high! Just at the precise minute while I just happened to be watching it...
If battery is low charge state, won't go past 11.5 - 8, idling. Need to put a charger on every 2 weeks.
Battery is new. (well 6 weeks ago or so.)
Time for a new alternator?
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Mike H
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Tompion
Administrator
1997 2.3 Ultima estate.
Posts: 2918
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Re: Charging Question
« Reply #1 on: Dec 6th, 2012, 4:54pm » |
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I usually find the dash reads a bit lower than my meter by about .5V
I prefer to measure at the battery.
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ABS multiplug wheel sensor pins MK IV or MK 20
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Mike H
Senior Member
Renault Clio
Posts: 2594
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Re: Charging Question
« Reply #2 on: Dec 6th, 2012, 6:21pm » |
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Ah just looked up dash tests, 'Voltage to instument panel, not necessarily means battery Voltage'.
Have to rig up a different way of reading it.
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Mike H
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a900one
Full Member
A scorpio is for life not just for christmas
Posts: 980
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Re: Charging Question
« Reply #3 on: Dec 6th, 2012, 7:44pm » |
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Mine reads 13.8 to 14.1 on dash readout, with engine running and putting lights on etc. Just bought a new battery as it failed  .
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Mike H
Senior Member
Renault Clio
Posts: 2594
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Re: Charging Question
« Reply #4 on: Dec 7th, 2012, 12:16pm » |
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Need to check fuses, might have some series resistance
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Mike H
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