The Kohler unit doesn't require a connection to a black wire in the harness, so skip that portion. The leftover black wire (after removing the old regulator) doesn't need to be connected to anything, either.Hi guys, i have a problem somewhere with my Kohler r/r setup. i have a SL350, so some wires are missing as per most wiring diagrams which refer to CB and CL, but mostly the same. I have used the plug and lead from the rectifier and soldered connectors for the four wires. red/white to the B+ terminal, green to earth with the mounting bolt and the other two to the terminals either end because i read in an early post that it didn’t matter which terminal the AC wires were connected to. After disconnecting the regulator i found the black regulator wire and figured it probably needs to be connected through the ignition to power the stop switch. when i went to connect the battery it sparked, and after about 10 seconds the wires to the r/r became very warm. i disconnected the generator plug and reconnected the battery and it didn’t spark. i have rechecked my wiring and it all looks ok to me. any ideas as to what the problem might be.
Double-check that your wires connected to the Kohler (battery and AC) are not in contact with the frame. One of the reasons I dislike the Kohler unit is because of the tendency for this to occur.
If all that looks OK, it might be time for a diode test on the unit. A multimeter will be able to get you the answers you need.