upgrading rectifier/regulator


Information and questions on GL1000 Goldwings (1975-1979)
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twostrokes48
Posts: 577
Joined: Mon Feb 14, 2011 11:21 pm
Location: San Antonio,TX
Motorcycle: 98 Goldwing 1500 trike
75 GL1000 (restoring)
98 Goldwing with landing gear (for sale)
94 Goldwing 1500- towpac trike (sold)
88 Goldwing 1500- (sold)
84 GL1200 Aspy-SOLD
75 GL1000(stolen 87)
88 GW trike (totaled)
1972 750k2

upgrading rectifier/regulator

Post by twostrokes48 »



I read on another forum (mentioned in topic (charging) on this forum. It was supposed to be plug and play using rectifier/regulator from a CBR600. So I purchased on. Now the regulator on the GL1000 is a 7pin connector but from the actual regulator there are 5 outputs. The 7 pins come from regulator output with red wire has two wires from same post and the Green wire has two wires from same post on regulator. So there are actually 5 input/out put wires from the rectifier. I assume the 3 yellow wires are inputs and the green and red are outputs. Well the unit from the CBR has a 5 pin connector which would be the same 5 at the rectifier of the wing. The only problem is one side of the connector is hard connected to the rectifier so no color codes to look at. The 5 pin plug is set up with one row of three pins and another row of pin - guide slot- pin. Does anyone know how I should wire it? If I assume the 3 pins on same line are the 3 yellow wires do I wire the red on right or left and the green on right or left on the other row of pins? There was not one piece of paper with any info at all in the box with the new one. So I have no info on it at all. Would appreciate any help. I'm doing this because I am getting very high voltage charging readings at battery and cooked a nice new one. So before I replaced it, I checked the charging voltage and was going as high as 17volts.


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Fred Camper
Posts: 1339
Joined: Sun Aug 16, 2009 9:15 pm
Location: Metro Detroit, MI
Motorcycle: 1977 GL1000, 1976 LTD GL1000

Re: upgrading rectifier/regulator

Post by Fred Camper »

The dual wires on the GL regulator are just because of the current required and the limitations of the connector. So Honda used two smaller wires to do the work of one bigger wire. You already figured that part out. My CBR600RR regulator had the same wire count as the 1977 GL regulator, so it was one for one. Two green, two red and three yellow all in two connectors, one for the input and one for the output, Yours is not that way as you have a 5 pin with both input and output combined. The three yellow wires are higher current, so they would be most likely to be spaced out in the connector.

I think you will need to find a newer CBR600 wiring diagram to show you which are which.
User avatar
twostrokes48
Posts: 577
Joined: Mon Feb 14, 2011 11:21 pm
Location: San Antonio,TX
Motorcycle: 98 Goldwing 1500 trike
75 GL1000 (restoring)
98 Goldwing with landing gear (for sale)
94 Goldwing 1500- towpac trike (sold)
88 Goldwing 1500- (sold)
84 GL1200 Aspy-SOLD
75 GL1000(stolen 87)
88 GW trike (totaled)
1972 750k2

Re: upgrading rectifier/regulator

Post by twostrokes48 »

Thanks for the help. After more research, it seems I may have just ordered the wrong unit. Plus, for some reason the way I looked it up on Ebay the first time, I must have mistyped something and didn't see anything for the GL1000 pop up. This time after typing it in properly, many combo r/r units are available. So I am just going to return or eat this one and order the correct one which is plug and play, as I see the connectors. My bad for not doing more homework before jumping on something in the first place. Another lesson learned.
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Fred Camper
Posts: 1339
Joined: Sun Aug 16, 2009 9:15 pm
Location: Metro Detroit, MI
Motorcycle: 1977 GL1000, 1976 LTD GL1000

Re: upgrading rectifier/regulator

Post by Fred Camper »

These later honda regulators are MOSFET and not the old GL1000 shunt type. So while the GL grounds the current when the voltage is too high, a mosfet just opens the circuit until the voltage drops correctly. So it is less heat on the Stator if I understand correctly. It sure holds better voltage at idle now, but still variation as the stator heats up and produces less at idle.
User avatar
twostrokes48
Posts: 577
Joined: Mon Feb 14, 2011 11:21 pm
Location: San Antonio,TX
Motorcycle: 98 Goldwing 1500 trike
75 GL1000 (restoring)
98 Goldwing with landing gear (for sale)
94 Goldwing 1500- towpac trike (sold)
88 Goldwing 1500- (sold)
84 GL1200 Aspy-SOLD
75 GL1000(stolen 87)
88 GW trike (totaled)
1972 750k2

Re: upgrading rectifier/regulator

Post by twostrokes48 »

Yes I noticed that. Both types but combine regulator/rectifier are available for the GL1000. The MOSFET runs $40.00 and the non-MOSFET run about $18-22. But, I still ordered the MOSFET and paid the extra. Not only is there the heat problem generated, but living in So.Cen.TX. where the temps will be over 100 degs. and the pavement is 160+ degs. Everything one can do to lower the temp. of components is a plus. Waiting for arrival of the new unit and will let people know how it goes after the change out. Hopefully better anyway.


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