silicone rectifier


Information and questions on GL1200 Goldwings (1984-1987)
Post Reply
User avatar
dagodave
Posts: 22
Joined: Wed Sep 12, 2012 3:45 am
Location: Chester England, United Kingdom
Motorcycle: 84 aspencade 1200 cb250 rs

silicone rectifier

Post by dagodave »



What is the silicone rectifier, where is it,what does it do,why do i need to replace it, and lastly how do i identify it I ask these questions because i am told if it is not in place the bike will not start Best wishes Dagodave 



User avatar
thrasherg
Posts: 2123
Joined: Tue Oct 20, 2009 11:21 am
Location: Plano, TX
Motorcycle: 2017 Yamaha FZ07, 2015 Yamaha Super Tenere ES, 2005 Honda Shadow 750, CRF450X, CRF230, CRF250X, XR200, CR500, Gas Gas TXT200

Re: silicone rectifier

Post by thrasherg »

Usually the silicon rectifier and regulator are a single unit, it is usually black about 2 inches square and has fins on it to keep it cool.
It takes the alternating current created by the engines alternator/generator and converts it to DC. The Dc is then fed to the regulator which reduces the voltage to around 13.8 volts, which is then used to charge the battery and run all the electrics on the motorbike. If the rectifier/regulator is missing or is defective, the bike should start, but as you are not recharging the battery the electrics and engine will eventually stop and then not operate until the battery is recharged. If you turn on the ignition and all the electrics are dim then the battery is low on charge and will prevent the engine from starting. The only way to know if the unit is working/missing is to really start the engine and measure the volts across the battery, they should be higher with the engine running than with the engine not running, or you have to disconnect the rectifier/regulator from the motorcycle electric system and check it with a multimeter. Hopefully someone can tell you where it is physically located on your wing so you can check (assuming you have just bought the bike). If you have had the bike for a long time then the rectifier will not suddenly disappear, but they have been known to go bad, but far more common is a plug that connects the rectifier to the alternator gets corroded, overheats and melts causing the battery to go flat and the electrics to fail.. If you do a search for "3 yellow wires" on this site you will see lots of links where people tell you how to remove the plug and solder the yellow wires together, but you do need to check the alternator first (You need a multimeter for that).

Regards Gary

User avatar
Phunnybone
Posts: 242
Joined: Mon May 28, 2012 3:48 am
Location: Rock Hill SC
Motorcycle: 1998 GL1500 SE (coming soon)
1985 GL1200 LTD (undergoing re-assembly)
1985 GL1200 LTD (#2) (parting out)

Re: silicone rectifier

Post by Phunnybone »

Don't know for sure on your '84, but on my '85 LTD the regulator/rectifier (commonly seen in the forum as R/R) is under the false tank on the left side (as seated on bike) even with the lower side of the left hand pocket in the fairing.

User avatar
tom84std
Posts: 493
Joined: Fri Jul 13, 2012 7:40 am
Location: Arlington, Texas
Motorcycle: '84 STD 1200
2002 VTX1800
2007 Shadow 750
69 BSA Bitsa
2004 Virago
VW Trike

Re: silicone rectifier

Post by tom84std »

I'm not sure but it could be that Dave may be asking about the other silicon rectifier located in the solenoid/neutral switch circuit.
Dave, it's a little black plastic cube about 10mmX10mmX20mm with a light green/red wire on each end. It actually has a diode symbol silk screened on it. I believe you'll find it under either the seat or false tank. It's main purpose is to insure the neutral lamp does not illuminate with only the making of the clutch switch. To isolate the clutch switch from the neutral switch.

User avatar
dagodave
Posts: 22
Joined: Wed Sep 12, 2012 3:45 am
Location: Chester England, United Kingdom
Motorcycle: 84 aspencade 1200 cb250 rs

Re: silicone rectifier

Post by dagodave »

thank you all for your positive input i can now i hope work out what is what many thanks froma very new 1200 goldwing aspencade owner (there are not to many left in england) dagodave

User avatar
WingAdmin
Site Admin
Posts: 21286
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (sold)
1998 XV250 Virago (sold)
2012 Suzuki Burgman 400 (wife's!)
2007 Aspen Sentry Trailer

Re: silicone rectifier

Post by WingAdmin »

In its wiring diagrams, Honda refers to the neutral diode as a "Silicon Rectifier" in some places, and a "Silicone Recitifier" (incorrect term) in others. In either case, it's just a diode.

User avatar
dagodave
Posts: 22
Joined: Wed Sep 12, 2012 3:45 am
Location: Chester England, United Kingdom
Motorcycle: 84 aspencade 1200 cb250 rs

Re: silicone rectifier/diode

Post by dagodave »

many thanks wing admin this site is great as british goldwing owner i think this is a great resource plus its nice to chat to other people in different places or places you would like to visit dagodave

User avatar
wingincolorado
Posts: 1
Joined: Tue Apr 26, 2016 6:34 pm
Location: colorado springs,co
Motorcycle: 1985 gl1200I

Re: silicone rectifier

Post by wingincolorado »



Is it possible to bypass this diode?

I think mine fried and the bike does nothing with key on and starter button pushed now.

User avatar
ptrumblejr
Posts: 9
Joined: Mon Sep 23, 2019 4:56 am
Location: bellaire,MI
Motorcycle: 1983 Honda Goldwing GL1100A Aspencade

Re: silicone rectifier

Post by ptrumblejr »

tom84std wrote:
Sat Sep 22, 2012 12:12 pm
I'm not sure but it could be that Dave may be asking about the other silicon rectifier located in the solenoid/neutral switch circuit.
Dave, it's a little black plastic cube about 10mmX10mmX20mm with a light green/red wire on each end. It actually has a diode symbol silk screened on it. I believe you'll find it under either the seat or false tank. It's main purpose is to insure the neutral lamp does not illuminate with only the making of the clutch switch. To isolate the clutch switch from the neutral switch.

i have an "83 Aspencade and need to replace this part. I cant for the life of me find the damn thing. My neutral light comes on every time i pull in the clutch. i have the new part but cant find the old one. I cant find any picture reference to its location. i have the seat AND the false tank off and cant find it. and suggestions? if I do find it i will be posting a picture for others.

User avatar
DenverWinger
Posts: 1523
Joined: Thu Jun 23, 2011 2:20 pm
Location: Denver, CO
Motorcycle: (s)
1980 GL1100 STD Vetter (2005-)
1993 GL1500 Aspencade (2017-)
1983 Trav-Lite Camper (2010-)
Past rides
1972 CL350 (1980-1988) sold
1978 Suzuki GS550 (1985-2005) sold
1977 GL1000 (2002-2006) sold

Re: silicone rectifier

Post by DenverWinger »

I believe your diode is wrapped up in the wiring harness under the shelter. Look for a diode-shaped bulge in the tape wrap.
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:

~Mark

User avatar
ptrumblejr
Posts: 9
Joined: Mon Sep 23, 2019 4:56 am
Location: bellaire,MI
Motorcycle: 1983 Honda Goldwing GL1100A Aspencade

Re: silicone rectifier---I FOUND IT!!!!

Post by ptrumblejr »


remove the regulator and the turn signal flasher
remove the regulator and the turn signal flasher


if you look thru the frame from this angle you should see it. this is the new one. the old was wrapped a little so look for the plug it stands out under there with all the black
if you look thru the frame from this angle you should see it. this is the new one. the old was wrapped a little so look for the plug it stands out under there with all the black


a long pair of forceps works well here
a long pair of forceps works well here


easy to change once you find it and it solved the Neutral light on when you pull the clutch issue.
easy to change once you find it and it solved the Neutral light on when you pull the clutch issue.




Post Reply