Faulty SH775

[Skinner]

I installed a new stator and SH775 R/R on my '82 Katana. Stator output is excellent, but the SH775 will not put out any power. There are 0 volts coming from the unit itself. I checked all my connections and they are solid. The R/R was grounded directly to the battery and the mounting bolt was grounded to the frame. Here's what I did to test it after I charged my dead battery:

• tested the stator to confirm resistance (or lack thereof) and output. Both checked out perfectly.
• tested the stator output at the connectors between the stator harness and R/R harness. All good.
• tested the stator output at the R/R connector. I used the Triumph-style connectors, and this tested good.
• plugged all connectors into the R/R and checked for any voltage at the battery connections - 0 volts.
• checked the output on the positive side of the R/R, directly at the R/R - 0 volts.
• double and triple checked that everything was properly grounded (both the negative connection and the R/R body) and repeated the tests - 0 volts.
• made up some new wires to connect directly to the R/R positive, negative and ground, bypassing the harness I made with the Triumph connectors - 0 volts.

So essentially I have power from the stator going into the R/R, but nothing coming out. I even checked to make sure I had the + and - sides on the R/R correct, which I did.

I then connected everything to the old stock R/R and all is well. The battery charges, voltage output does what it should. So call me frustrated and disappointed that the SH775 doesn't work. I ordered it used off eBay because these things "never" go bad, as I did for my previous GS650GL. And it is a genuine SH775.

Am I missing anything? No matter what I did I could not get any output from the R/R.

[posplayr]

If you are sure the R/R(+) is connected to the Battery then you should see voltage there. Assuming you found a ground then you would verify that with a test light (Batter on one side, clip to your suspected ground).

If these pass and the voltages are as you say then the SH-775 is broke. Send it back to the seller.

Given your old R/R works I suspect that it is just a failed SH-775

[Skinner]

If you are sure the R/R(+) is connected to the Battery then you should see voltage there. Assuming you found a ground then you would verify that with a test light (Batter on one side, clip to your suspected ground).

If these pass and the voltages are as you say then the SH-775 is broke.

Yes to all of the above. The same connections to the stock R/R function perfectly. I’m happy I decided to keep the old one for esthetic reasons, and that I left about 5” of wiring attached. Made it easy enough to reattach everything with new connectors. Disappointed, but stuff happens.

[Nessism]

Sure you hooked it up properly? Bypassed the factory wiring?

Three stator wires directly into R/R?

+ and - straight to the battery (for a test anyway)?

[Skinner]

Hi Ed,

Absolutely hooked up correctly. As per the pic you attached. Stator direct to RR, negative to battery, positive to the red harness wire. No joy.