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Old 06-11-2017, 13:22   #1
teeth2k
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Possible fault help

Hi all
Last night I noticed when I first started my car pd105, the headlights would get slightly brighter when I revved the car, after a drive this wasn't that noticeable, could this mean either the battery's on it's way out or the alternator is on it's way out?
Also could this be related to why I have to have the cam sensor unplugged to get the car to start?

Any info would be much gratefully received
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Old 07-11-2017, 18:06   #2
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a voltage test wouldn't hurt but not immediately after a run say1/2-1 hour after should be ideally 12.6 then start check then switchon load and see if it dips much---------re cam sensor -wouldn't think it's relevant
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Old 07-11-2017, 20:15   #3
teeth2k
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Quote:
Originally Posted by cheshire cat View Post
a voltage test wouldn't hurt but not immediately after a run say1/2-1 hour after should be ideally 12.6 then start check then switchon load and see if it dips much---------re cam sensor -wouldn't think it's relevant
IV read on the web that the sensor could be down to the battery or alternator if replaced and still at fault


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Old 10-11-2017, 20:54   #4
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With a multimeter on the battery the alternator should charge at around the 14.2- 14.5v mark and dip but recover as you load the current draw by turning lights etc on.

If you are getting less than 13.8v then you're not getting enough to keep the battery charged so could point to a faulty alternator but do check all the connections as breaks or corrosion can create resistance.

Last edited by verbal_kint; 10-11-2017 at 23:42.
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Old 11-11-2017, 11:13   #5
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Quote:
Originally Posted by verbal_kint View Post
With a multimeter on the battery the alternator should charge at around the 14.2- 14.5v mark and dip but recover as you load the current draw by turning lights etc on.

If you are getting less than 13.8v then you're not getting enough to keep the battery charged so could point to a faulty alternator but do check all the connections as breaks or corrosion can create resistance.
IV done a test with a multimeter and the battery is 12v on standing and 14v with engine running

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