burger12461

Hi all
Got a problem with 2004 scooby not charging
I've checked all wiring also lucky enough to have
Spare alternator which I fitted still not charging. Had
Auto electrician check out system can't find a fault .
Taken alternators in for testing both came back as
All good . Battery all checked charged & healthy
Scratching my head where to go next
Any ideas much appreciated

derek sti

Tracker.

tubbytommy

iTrader: (20)

is the battery light on when ignition is turned on before starting??

if not this can cause a problem with the charging system, check the wirinig on the centre multiplug on speedo

johned

Smart alternator?.

burger12461

Yea light on on dash when ignition on when running stays on and brake warning light . Yes is a smart alternator

Turbotits

iTrader: (2)

Ive had similar with a toyota last week. Although the alternator when tested was charging ok. The smart bit of the regulator wasnt sending a signal back to the car to tell the ecu it was charging.

burger12461

That's possible but I've already tried another alternator off my own car that I knew was good . I've had both alternators tested on bench by specialist & they say they are fine . When I fitted other alternator it did charge for around 1 minute though ???

jimbo14prodrive

switch lights on then see if it charges as said they are a smart alternator that only charges when its needed hence turn lights on when running

burger12461

Hi I have also tried charge test with lights on still the same with battery warning up on dash & brake warning light ?

alcazar

iTrader: (2)

If the battery warning light remains on, it's not charging.

Tell the auto electricians to test it for you ON THE CAR....bench testing is pretty useless except first off after a rebuild of the alternator.

burger12461

Alternator tested on car with both alternators still not charging . However if I pull alternator fuse system overcharges ???

johned

All earths ok?.

burger12461

All earths good . Could I have ECU fault ??

johned

Have you sorted it?.

burger12461

No still not sorted as of yet . Tried a brand new alternator as we'll

rob84

iTrader: (5)

Have you got a battery live on the white wire ? this is fused by an 80amp fuse in the engine bay.
The blue and red wire will go back into the cars internal fuse box number 3 which is linked to the light relays.

The black an white wire goes to the battery lamp on the dash clocks, if that's working then that should be ok.

the only other wire is solid black and goes to the ECU