Diode Board Connections

[fredheiler@aol.com]

I have a question about two of the diode board connections. The big battery connection at the top is obvious, as is the three-pin connector. However, the remaining two tabs (at right angles to each other) at the bottom of this photo could be interchanged -- one has two green wires into one connector, and the other has one black wire into its connector. Anyone recall which goes where?

Thanks, Fred Heiler

 

[20774]

Bike model and year? I think you're talking /5. Guess I don't know what you mean. In looking at my Haynes diagrams, it would seem that these two connections are the same D+. And according to the diagram they both have blue wires connected to them, one going to the voltage regulator and the other to the starter relay. This also matches the Motorrad Elektrik diagram for a /5. Same thing on EME's site:

BOSCH - 3-Phase Charging System Diode Board Upgrade for BMW R Airhead ; 12 31 1 244 062, 12 31 1 244 063, 12 31 1 357 498 / EnDuraLast 60 AMP Diodes.

Part #: BOALT-Rect063 EnDuraLast Alternator Diode Board / Rectifier for BOSCH Charging System. Premium Quality Aftermarket diode board Replaces BOSCH Original Equipment diode board on ALL BMW Airheads and Moto Guzzi model with BOSCH 3-phase

www.euromotoelectrics.com

Am I looking at the wrong thing?

 

[beemerguru]

One part most people overlook when replacing the diode board is checking the connectors inside the bike's original three-prong plug that goes into the back of the diode board. I've traced charging problems to the obvious suspects but finally found the problem with that connector with green, corroded, what used to be female connectors. This plug is hidden behind the diode board so nobody checks it unless they're replacing the board.

The blue wire can connect to either the vertical or horizontal tab...doesn't matter which.

 

[20774]

One part most people overlook when replacing the diode board is checking the connectors inside the bike's original three-prong plug that goes into the back of the diode board. I've traced charging problems to the obvious suspects but finally found the problem with that connector with green, corroded, what used to be female connectors. This plug is hidden behind the diode board so nobody checks it unless they're replacing the board.

I discovered the same thing with the OEM molded three female connector on my /7. The large molded plug tends to trap moisture. I'm sure people can make new cables/connectors but I had Motorrad Elektrik make three separate cables to replace the original set.

 

[omega man]

Dialectic Grease on the connections my help keep (clean) connections fresh.
OM

 

[fredheiler@aol.com]

Thanks, guys!