WTB: diesel mk2 ac 90 amp alternator

[damac]

I think I need one of these.  Somebody sold me one and I put a test light on the d+ terminal and battery and get nada like my others?  Can't excite it to charge so not sure of its status.  Unless replacing the voltage regulator/brushes could somehow  bring it back to life?

[745 turbogreasel]

Unless replacing the voltage regulator/brushes could somehow  bring it back to life?

Old wives tail, only works 85% of the time.











seriously,  go to the Junkyard/heap and bag 3 brush sets, you'll probably win.

[fatmobile]

 You are doing this testing while it's mounted in the car?
 Really pretty vague about what you're doing and how.
 Sounds like you don't even have a way to connect an exciter wire to it?

[damac]

You are doing this testing while it's mounted in the car?
 Really pretty vague about what you're doing and how.
 Sounds like you don't even have a way to connect an exciter wire to it?

sorry, i daily drive a 79 rabbit.  i swapped the mk2 diesel alternator into it last week and ran the battery down a couple times before thinking maybe its not charging

if i hook a test light between d+ terminal and battery + i get nothing with this alternator?

but if i slap some others i have in the garage back on the car the test light goes off.

unless i read wrong, i thought that was a way to test and mimic the chasis wiring(which i did because the red light didn't come on at all)

[TylerDurden]

I'm with 745... I grab those regulators whenever I can. They are the most likely component in the charging system to fail.