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General Category => General Discussion => Topic started by: Inshan on June 09, 2019, 10:05:07 PM

Title: 850T charging system question
Post by: Inshan on June 09, 2019, 10:05:07 PM

I bought a 1975 850T that was not charging due to an open rotor.  I elected to upgrade to this system from Euro MotoElectrics: https://www.euromotoelectrics.com/product-p/edl3-altkit105.htm

So far I have everything installed and wiring is OK except one wire which I believe is the 61 circuit.  See pic

(https://i.ibb.co/qFnpdYJ/rect.jpg) (https://ibb.co/qFnpdYJ)


Greg Bender's pic:

(https://i.ibb.co/dfRzG5g/rectifier-1.jpg) (https://ibb.co/dfRzG5g)


This is the new rectifier (diode board) that came in the kit.  It doesn't have a 61 terminal as far as I can tell.  Do I splice the 61 together with the D+ wire?  Hoping someone else has done this before.

(https://i.ibb.co/52VqbZS/new-rec.jpg) (https://ibb.co/52VqbZS)

Title: Re: 850T charging system question
Post by: Inshan on June 09, 2019, 10:10:28 PM

This is the wiring diagram supplied by EME.  This kit is primarily meant to retrofit BMWs with the Bosch charging system like ours.
The Guzzi has minor differences.  Mine has no Y wire, but I am adding one.  Their diagram shows no 61 equivalent circuit/terminal as far as I can tell.

(https://i.ibb.co/PMMBnhL/diagram.jpg) (https://ibb.co/PMMBnhL)

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Title: Re: 850T charging system question
Post by: Kiwi_Roy on June 10, 2019, 12:14:43 AM

Yes 61 and D+ are connected together as shown on any of the schematics from the 80sThe Y terminal is not essential.

http://www.thisoldtractor.com/guzzi007/schematics/1978_LeMans_II.gif

Title: Re: 850T charging system question
Post by: Inshan on June 10, 2019, 07:16:00 PM

Roy,

thanks for the confirmation!

Title: Re: 850T charging system question
Post by: Groover on June 12, 2019, 07:35:24 AM

A simplified diagram I made a while ago to wrap my head around the charging system a little better. Looks like 61 goes to the charge indicator bulb, which is required to have a load for the original setup to work. They must have eliminated that weak link in that rectifier.

(http://www.scooteropolis.com/images/guzzi/wg/test_diagram.jpg)

Title: Re: 850T charging system question
Post by: Inshan on June 12, 2019, 02:55:23 PM

THanks Groover,
I did find your diagram and related thread in my research before I decided to post.  It was helpful.

Title: Re: 850T charging system question
Post by: Tom on June 12, 2019, 03:38:18 PM

Let us know, how it finally goes.   :thumb: