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Electrical problems
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Tanz
 


Member Since: 18 Feb 2015
Location: stoke on trent
Posts: 32

England 2007 Discovery 3 TDV6 SE Auto Java BlackDiscovery 3
Electrical problems

Hi guys im after a bit of help,about a month ago my alternator packed in without any warning so i replaced it with the only 1 i could get my hands on at the time which cost about £110.since then ive noticed pulsing headlights and interior light on tickover,tonight when i started the car my radio was cutting out as i revved the car lights were pulsing then warning lights started going off left right and ctr what do we tnink it could be dodgey alternator or the battery on its way out hopefully nothing more serious
Thanks in advance for any help
  
Post #179845231st Mar 2017 11:50 pm
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Roidster
 


Member Since: 04 Nov 2016
Location: London/Herts
Posts: 137

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

One word- Denso
 2005 Discovery 3 HSE
(RLD Wheel Protector, Altox FBH Remote, IID Tool) Viscous Fan spanner’s Available to lend

Audi Q2 1.4 TFSi Edition #1 (SWMBO's)

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Post #17984591st Apr 2017 12:43 am
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Sniper1
 


Member Since: 14 Mar 2017
Location: Somewhere near earth
Posts: 75

United Kingdom 2007 Discovery 3 TDV6 HSE Auto Baltic BlueDiscovery 3

I would agree with Roidster, albeit we dont know what alternator you bought.

Ive learned very quickly in my disco 3 ownership that electric power is king on these, poor current, bad batteries all contribute to amazing faults showing up.

Firstly, what alternator did you buy/fit

Who fitted the alternator? If you did it yourself, did you make sure all cables were attached securely.

It certainly sounds like an alternator problem, as if the reg/rec on the back of it is faulty/wrong, or if its totaly wrong for the discos thirst for electric.
  
Post #17984791st Apr 2017 7:26 am
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Tanz
 


Member Since: 18 Feb 2015
Location: stoke on trent
Posts: 32

England 2007 Discovery 3 TDV6 SE Auto Java BlackDiscovery 3

Thanks for the replies guys,its defo no denso it was the only 1 available at the time.The thing is when i put a multimeter on it reads 12.7volts on the battery then when the cars running it shows 15.1 volts so im a bit confused
  
Post #17984891st Apr 2017 8:01 am
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Roidster
 


Member Since: 04 Nov 2016
Location: London/Herts
Posts: 137

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

There have been all sorts of weird faults down to alternators on here. Lots of them were down to cheap ones, lots of them were even down to refurbished ones fitted by main dealers! I assumed you had fitted either a really cheap one or a refurbished one based on the £100 price you paid because a Denso one would cost min £199 if you shop about. Denso is OEM fitment by the way (so same as original).

Last question, was it ok before the alternator went wrong?

Batteries can be taken out by alternators failing but usually they fail big time-as in dead
 2005 Discovery 3 HSE
(RLD Wheel Protector, Altox FBH Remote, IID Tool) Viscous Fan spanner’s Available to lend

Audi Q2 1.4 TFSi Edition #1 (SWMBO's)

Previous:

BMW E60 M5 5.0 V10
BMW 330Ci Sport Convertible 
 
Post #17984941st Apr 2017 8:21 am
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Globetrotter448
 


Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1771

Australia 2007 Discovery 3 4.0 V6 Petrol SE Auto Java BlackDiscovery 3

Did you move/disconnect any cables whilst fitting the alternator. I would start there especially around earth connections
  
Post #17984951st Apr 2017 8:22 am
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Tanz
 


Member Since: 18 Feb 2015
Location: stoke on trent
Posts: 32

England 2007 Discovery 3 TDV6 SE Auto Java BlackDiscovery 3

It was fine we had been out for the day stopped at a pub just outside sheffield for some tea on the way bak and as we pullec on the carpark thenav screen went off when we come bak out it was totally dead so £300 and a ride on a tow truck we got bak home.the only place to stock a alternator that sunday was a local car parts so could only get what was available. .
Ill hav a check at cables later then maybe new alternator to be ordered from euro
  
Post #17984981st Apr 2017 8:27 am
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Sniper1
 


Member Since: 14 Mar 2017
Location: Somewhere near earth
Posts: 75

United Kingdom 2007 Discovery 3 TDV6 HSE Auto Baltic BlueDiscovery 3

Have your battery drop tested as well.
My battery tested ok, at 12.2v static, and 14.7 running,
However, it dropped below 9v when starting.
It also failed a 600 cranking amp test, when its a 900 crank amp battery.

If the battery is indeed ok, then unplug the alternator and run the car. The battery light will be on, but if it runs ok then you know the alternator is screwing the system.
Youll need to clear all the codes that have been stored now before doing this.
  
Post #17984991st Apr 2017 8:28 am
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