Need Rectifier & Wiring Harness


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swr1977
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Need Rectifier & Wiring Harness

Post by swr1977 » Thu May 24, 2018 4:22 pm



Can anyone tell me where to get a rectifier 31700-371-000 and ALL the wires / wiring harness & plugs that goes to it... the "rats nest" I have needs to be replace! I have an under voltage charging problem! The previous owner removed the plug and replaced with quick disconnects. Last summer I found a few melted wires so I cut out back and replaced what I had to. Now I'd like to go back to what was originally on the bike if I can find it!

I've found a few on e-bay but am unsure if all GL1000's used the exact same one? I don't want to order the wrong one and have it cause another problem! or something that is just as bad as what I have (melted wires)

https://www.ebay.com/itm/172796336538?s ... 1436.l2649

https://www.ebay.com/itm/192213830663?s ... 1436.l2649

See picture of what I have below...
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swr1977
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Re: Need Rectifier & Wiring Harness

Post by swr1977 » Thu May 24, 2018 6:00 pm

Would the wiring harness & plugs from a 77 -> 78 be the same? I just found this but don't know!?
https://www.ebay.com/itm/77-HONDA-GOLDW ... 0005.m1851
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Fred Camper
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Re: Need Rectifier & Wiring Harness

Post by Fred Camper » Thu May 24, 2018 9:17 pm

Better to buy something newer than 40 years old. I replaced mine with a 2006 CBR600rr unit and it had exactly the same wires. Much better performance as it is Mosfet and not a grounded unit.

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swr1977
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Re: Need Rectifier & Wiring Harness

Post by swr1977 » Thu May 24, 2018 9:25 pm

Fred Camper wrote:
Thu May 24, 2018 9:17 pm
Better to buy something newer than 40 years old. I replaced mine with a 2006 CBR600rr unit and it had exactly the same wires. Much better performance as it is Mosfet and not a grounded unit.
So let me get this straight ... the rectifier from a 2006 CBR600rr is the same as a rectifier from a 1978 GL1000? and not to make myself sound stupid... but what is a Mosfet?
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kndw
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Re: Need Rectifier & Wiring Harness

Post by kndw » Fri May 25, 2018 12:58 am

No, it's not the same. The CBR600rr units are integrated regulator/rectifiers, so you can replace those two old parts with the single new part. Apparently modern reg/rec's somehow use transistors (MOSFET) which are more efficient than the old ones that use a different method.

By the way you do not need to have the CBR unit specifically: there are many options. Just make sure they have the same leads and can handle the output of the alternator. I have tried €20 chinese things (didn't work) and €60 chinese things (which worked great).

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Re: Need Rectifier & Wiring Harness

Post by WingAdmin » Fri May 25, 2018 7:37 am

MOSFET transistors are capable of switching extremely high currents. So instead of shunting unused power to ground, the way our old regulators function, a MOSFET regulator can instead just limit the amount of current getting through, but when needed, it can let the full current through with very little resistance. So they are more efficient and produce less heat.

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Re: Need Rectifier & Wiring Harness

Post by madmtnmotors » Fri May 25, 2018 8:18 am

The single crimp connectors that were used in your repaired harness typically contribute to the problem. A new harness will help you eliminate those, but if you have to make any repairs to the harness in the future there are a couple of better methods described in this thread:

viewtopic.php?f=13&t=17175
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swr1977
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Re: Need Rectifier & Wiring Harness

Post by swr1977 » Fri May 25, 2018 8:59 am

Thank you to all who've commented... and I appreciate you trying to have me modify/buy/replace with something newer and better rather then replacing with original parts that might not be as reliable. I will consider "Rest-O-Moding" the electrical system... but that still leaves me with my original questions that no-one has answered...
swr1977 wrote:
Thu May 24, 2018 4:22 pm
Can anyone tell me where to get a rectifier 31700-371-000 and ALL the wires / wiring harness & plugs that go to/with it?

I've found a few on e-bay but am unsure if all GL1000's used the exact same one?

https://www.ebay.com/itm/172796336538?s ... 1436.l2649

https://www.ebay.com/itm/192213830663?s ... 1436.l2649
swr1977 wrote:
Thu May 24, 2018 6:00 pm
Would the wiring harness & plugs from a 77 -> 78 be the same? I just found this but don't know?
https://www.ebay.com/itm/77-HONDA-GOLDW ... 0005.m1851
Here is what I need to know... Do all the GL-1000 have the same rectifier? and are the wiring harnesses the same?

Parts are getting harder and harder to find... and I'm thinking of ordering one if not both of the rectifiers and the wiring harness above just so I'll have them... but I might go with a newer more reliable rectifier/regulator for better reliability.

If anyone has a original regulator & rectifier & wiring harness from a 1978 GL1000 they would be will to give or sell me at a good price please let me know!
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swr1977
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Re: Need Rectifier & Wiring Harness

Post by swr1977 » Fri May 25, 2018 8:18 pm

madmtnmotors wrote:
Fri May 25, 2018 8:18 am
The single crimp connectors that were used in your repaired harness typically contribute to the problem. A new harness will help you eliminate those, but if you have to make any repairs to the harness in the future there are a couple of better methods described in this thread:

viewtopic.php?f=13&t=17175
Thanks... I just re-read this thread/tutorial, very informative. I've read it before but it's been a few years. I'm thinking maybe if I just re-connect / resolder some of the connections, my under-voltage / charging problem might go away.
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madmtnmotors
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Re: Need Rectifier & Wiring Harness

Post by madmtnmotors » Fri May 25, 2018 9:09 pm

swr1977 wrote:
Fri May 25, 2018 8:18 pm
I'm thinking maybe if I just re-connect / resolder some of the connections, my under-voltage / charging problem might go away.
Might be worth a shot, and it's free! Well, you might have to buy some heat shrink, but solid connections would at least rule them out as the culprit. Figuring out electrical problems often requires figuring out what it's not. ;)


Wilbur


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