All Things Mk5 > How to Guides / Troubleshooting
Battery drain still happening... Completely stumped :( **UPDATE**
Craigh1983:
And would it really die in just 2 days still?
rich83:
Maybe its not charging correctly... Could be a dodgy alternator?
Craigh1983:
--- Quote from: richwig83 on April 08, 2014, 09:18:28 am ---Maybe its not charging correctly... Could be a dodgy alternator?
--- End quote ---
Had the alternator checked by about 3 people with a multimeter and they all said it was working
Teutonic_Tamer:
--- Quote from: Craigh1983 on April 08, 2014, 09:02:27 am ---Would the 027 cause that much battery drain though?
--- End quote ---
It's not the battery 'drain' per se - it's simply the fact that lower capacity batteries simply can't 'store' enough power when the engine is running. Then when you stop the car and lock up, it can be up-to two hours later before all electrical modules go to sleep. And don't forget that TIM settings on your RDS head unit can draw power for two hours twice daily, even if the car isn't used.
The fact that not enough power was stored, systems running on, RDS auto updating . . . . and then two or three days later, your battery doesn't have enough juice to start the car.
Like I said, they are extremely sensitive to the correct spec battery. My GTI had the wrong battery fitted at the factory - instead of mine being fitted with the correct 72Ah, CCA 380A DIN, 640A EN/SAE spec, it was fitted with a 70Ah, CCA 340A DIN, 570A EN/SAE - and we would frequently be stranded due to a flat battery. After MANY visits to my truely incompetent stealer, banging my head against the wall to fit the correct battery, and being denied - I had to go to VW UK Customer Care, threatening them with Trading Standards regulations (not as described, not fit for purpose) - they then instructed my stealer to fit the correct 72Ah - and that correct item was perfect, and never let me down for seven and a half years.
Who sold you those incorrect batteries?
Teutonic_Tamer:
--- Quote from: richwig83 on April 08, 2014, 09:18:28 am ---Maybe its not charging correctly... Could be a dodgy alternator?
--- End quote ---
Doubt it - battery warning light would come on in the dash. And multiple DTCs will be logged across various modules during normal running.
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