How do I test the regulator/rectifier?
My alternator/generator/stator is fried, so needed to test reg/rect to see if that is junk too.
Attempted to test my '02 TT600 reg/rect last night using the "cold" test from DEcosse's post in the tech compendium - but failed miserably. Maybe cos it was late at night and I was tired, maybe it was the zero celsius temp, maybe the TT and D650 wiring is different, or maybe I'm just thick, but I couldn't suss it.
At the R/R
My R/R has 5 wires into 1 connector block (I'll call it "#1") - 3 black (obviously the 3 phase AC input) and a black/red and black/white (obviously DC output). Black/red should be +ve and black/white -ve.
At connector block #1
3 black/blue wires from the loom (presumably from the alternator/generator/stator) connect to the black wires on the R/R.
A brown wire from connector block #2 connects to black/red wire. (+ve)
A black wire from connector block #2 connects to the black/white wire. (-ve)
At connector block #2
The brown wire disappears into the loom, as does the black wire.
3 yellow wires disappear into the loom. NOTHING CONNECTS TO THESE YELLOW WIRES.
So this is where I get confused with DEcosse's post as my wire colours are nothing like the D650 and I was expecting the yellow wires to have come from the generator and connect to the R/R!!!!!
What I did test was the 5 pins on the R/R connector (with the R/R unplugged).
With the multimeter (set to Ohms-tried on 20k, 200k & 2M) red probe on the black/white (-ve DC outlet) pin, I put the black probe on each of the 3 black/blue (AC input) pins. I got very similar readings (at each Ohm setting) for all 3 AC pins.
At this point it was midnight and I was v cold (I can hear the violins....), so I THINK when I tested the black/red pin against the 3 black/blue pins I got a "1" on the m/m. Does this mean open circuit and therefore R/R is junk?
So, just how do I test the R/R?????
Also, I gues I'll have to lift the tank and try and trace the 3 black/blue wires and the yellow wires to see which ones connect to the generator.
Forgot to say that I tested the R/R whilst connectors plugged in (engine off). Got same DC voltage from testing across black/red wire and black/white wire as from direct battery test (12.6V). Battery had been on Optimate III charge and then stood for an hour.
Last edited by andy_tt600; 11-26-2008 at 07:58 AM.
Reason: Extra info added