The other night I cleared the snow and ice off of my car to do a shop run, got in and flicked the wipers on to clear the loose stuff off the window. Unbeknownst to me the wipers were encased in ice (they tuck in under the edge of the bonnet when not in use)
When I flicked the wipers on, the motor strained for a moment, then all the dash lights illuminated and the car stopped charging...
Naturally the wiper motor fuse didn't blow, but something else did.
Did all my troubleshooting, checked the power fuse, checked the fusible link, checked continuity between alternator and battery, checked the voltages on the three pin alternator plug etc, all fine. Checked the voltage directly at the alternator, fluctuating between 11.4v and 7v, up and down, up and down.
So I guess it blew the regulator! Took the alternator off to investigate...
By the way, if you do this you don't have to worry about the aux belt falling off and having to re-route it. Makes life easier. Belt is fairly recent hence not using the opportunity to replace it. (Also I don't have one)
Alternator out. Fairly easy. A tonne easier than the LS400. Hardest part was finding a gap to squeeze it through.
She's the original flavour, 10 94 manufacture date I think.
Very manky inside...
At this point I gave up on my plan to fit a new regulator and brushes... The outer brush has worn through the spindle on the armature until there was no copper left!
No idea how that happened, the riding surface for the inner one looks fine, and both brushes have the same level of wear, and they both spring into the brush holder freely.
As an aside, really easy to access both sides of the fusible link on this! On the later GS and the LS etc, there are loads of fiddly clips you have to unclip simultaneously whilst pulling upwards, they are stiff, and like to break. On this, undo the nuts, unplug the plugs, take the positive terminal off of the battery and push some slack into the bottom of the box, and it just lifts right on out!
New alternator should be here tomorrow...