I just have a quick question....I'm about to replace the turn signal relay but I was wondering if I absolutely have to disconnect the negative cable from the battery. If i do, than is there anything else besides the radio lock up that i need to know about, or is unlocking the radio all i need to do after i reconnect the ground? I have a 2001 A4 1.8T

 

when i disconect my batt to clear cel codes i just do the neg, when i connect it back up i do a tb realignment, but i never have had to type in my radio code, good thing to cus i donno where it is

 

Someone correct me if I'm wrong, but I think a new feature on the 2002 and up model A4's, a "Battery Backup" was installed. I've disconnected both the positive and negative lead's of my battery several times for mis. things, and have never had to input the radio code.

Do the older models not have this?

 

what does the "tb" stand for?

 

throttle body

 

my code was in my manual when i bought the used car.

 

ya mine should be there but i have not looked

 

jeff...how did you perform the tb realignment?

 

turn the key to the on possision but dont start the car, leave it there for like 5 min, during this time the tb will be realigining it self and u will hear some noises but its ok

 

ok cook thanks.....i thought i need to connect a scanning tool....thats what i'm reading in the manual, but i guess I don't