Audi Repair Questions? Ask a Mechanic for Answers ASAP
Hello, I'm Jason. I will do my best to answer your question quickly and accurately using the information you have provided.
Hello there. Still reading through actually
Ok, let me ask the first obvious question. The alternator you bought? Audi OE or Bosch reman?
I'm not sure, the repairs were done at the VW dealership that my father works for
ah, gotcha, so I'll assume it's a factory alternator
He is currently trying to get a hold of the mechanic who worked on it
is having hard time contacting him though
sure, understood. These are relatively simple systems
I know you mentioned the belt and pulley, but if the belt is turning ok, not jumping or making noise, that's likely not the problem
We noticed nothing odd with the belt
what's voltage at idle?
We didn't have a meter on hand =\
Ok, so you're looking at the dash gauge, I assume
just watching it fall... lol
after revving engine tho it jumped up to normal though and did not falter
it took a minute of revving at low rpm though at least
let me take a quick look at the diagram. Honestly, this sounds like a faulty alternator
somewhat rare, but not impossible
I was reading someone with an alike issue and they replaced alternator 3x only to notice that the alternator fuse was burnt out
Is this a possibility?
no problem....just going through the diagram now. Few minutes
oh, which engine please?
There really isn't a dedicated alternator fuse on this car.
since the exciter wire goes right to the instrument cluster
and the main power wire......
might want to take a look at the large connection on the starter as well
make sure that's not loose
since that chains to the large alternator connector
I've seen this exacty 2x
i did notice that the little shield that sits in front of the windshield at the back
was rubbing on a wire
i taped it up
The lower cowl plastic shield?
it had become disloged
i secured it though and hasn't come loose since
the wire was connected to the battery
yeah, that shouldn't be an issue, as this wiring goes through the front side of the engine ECU box, then down into the car
oh, that cable
it appears to still be secured
Here's what I would do
have the car running. Check voltage at + and- on the battery itself.
Record voltage at idle
Then leave negative probe on the negative terminal
Move positive probe to large alternator connector
see if there's a significant voltage change checking it that way (over 0.2v)
if there is, there's a loose connection
If they're both dead-on, replace the alternator again
If alternator tests fine, what would be your next course of action?
and there isn't a loose connection at battery
or will that pretty much sum it up
it's only going to be one of these two issues, I'm sure
since voltage dropping so quick I can't see it being any low voltage fuse
am i correct in thinking that?
yes, correct, not a fuse
ok, I will pass this info along and make sure that it's done and hopefully won't have to go through this again lol
I well understand. Hope it goes smoothly
been without it for about a month
as do I
You were very helpful, I appreciate it
Ironic....I actually drove mine home tonight. Usually drive an Allroad or TT
TT away for winter, Allroad under the knife
and glad to ehlp
lol I love the car despite this issue and the high mileage
still runs like a kitten
anyways, I will let you go, have a pleasant evening
Great to hear. Mine is kind of a shop beater wagon. Low, V6, 5-spd, plasti-dipped black, tinted.
ciao XXXXX XXXXX