Hi folks

Battery was flat after a month abroad.

AA chap said my battery is healthy but told me my alternator was playing up based on his tests.

Might also explain the intermittent HDC fault/service light that pops up 20% of the time .

Any advice on the best brand alternator?

thanks

Denso is OEM I think and recommended. 2016 Skoda Octavia VRS Estate
<gone>2009 FF Vogue TDV8 Buckingham Blue</gone>
<gone>2015 BMW 520D SE (not my favourite car)</gone>
<gone>2009 D3 HSE Galway Green</gone>

ybl405 wrote:

AA chap said my battery is healthy but told me my alternator was playing up based on his tests.
Might also explain the intermittent HDC fault/service light that pops up 20% of the time .

If you are getting HDC Faults and the battery is not charging - Please, please, please check your ground/earth straps. The alternator may be fine or a bit stressed because of a bad 'earth'. The Earth points live behind the front wheel arch liners and if you are in a climate that uses salt on the roads... they will get eaten alive.

This is my L322 - but a similar issue. I went through 3 starters and 2 alternators in 6 months along with random cascading faults. My Indy said they would not replace a 4th starter under warranty - because my drivetrain was not grounded to the body/battery. I ran a ground lead from an old Jeep project from the lug under the bonnet down to a mounting bolt on the starter. The alternator produces the most current - the starter requires the most. My current battery says production date of 10/18 and same starter/alternator for 6 years. Also got rid of the random cascading faults.
These things have a million sensors and they all work off of a 'signal voltage' - if the signal is wrong - faults start cascading...

Click image to enlarge

You can have all the juice in the world, but if the circuit is not complete... it will do no good.

Best of luck with it - JDW 2006 L322 HSE LUX 4.4NA Jag V8 Buckingham Blue/Ivory - 'Col Reb'
Rolled Yahtzee Aug 2023 222,222Miles
2016 L405 HSE TD6. Santorini Black over Almond. - 'Donna the Diesel'
Only L405 IN THE KNOWN UNIVERSE with an L494 Shift Lever Fitted!
97K at purchase Sept of 2023