does any one have a 81 bj wiring diagram for the alt?

[attatoy]

i am lookin for this diagram to fault my alternator, it will raise voltage two volts around 2500 rpm, my belt is tight , and i belive the reg is fielding the the armature as i pulled the cover off to check brushes and they look good, continuity though armutur, and seems to have power on the other side of the armuture, i have been told blown diodes. how bad is this(price wise) to have repaired? any one know how t fault a rectifier? or reg, like i said a wiring diagram would be nice.

thanx
Myles

 

[ivanhoe]

hi,
bad diodes will discharge the batteries. if left too long on cold temperatures, it would freeze your batteries to useless batteries. any alternator shop will check and repair. i had it done a couple of times and it was not too much $$ mind you, the batteries was a set back!!!! bad regulator will prevent decent charging or over charging!
hth,

 

[UpsideDown]

Check your brush length.

The brushes may look good, but if not long enough, they will float under load and not provide a charge. IIRC, the "new" spec is for something like 20mm of stick-out, but I should really check that one.