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General Category => General Discussion => Topic started by: n3303j on April 11, 2026, 02:38:25 PM

Title: T3 (etc) Voltage Monitoring (No Surprise)
Post by: n3303j on April 11, 2026, 02:38:25 PM

(https://i.ibb.co/xqYM7Kcr/20260409-160931.jpg) (https://ibb.co/xqYM7Kcr)

(https://i.ibb.co/tPq73rJR/Screenshot-20260411-152310-Chrome.jpg) (https://ibb.co/tPq73rJR)

https://www.amazon.com/gp/aw/d/B0C7CH4HJJ?psc=1&ref=ppx_pop_mob_b_asin_title

Been surprised four times when a Guzzi charging system went away during a long stretch. This looks like the surprise eliminator. Waterproof, daylight readable, small enough to fit in the corners and cheap enough to warm any Guzzista's heart. Bracket is 1/4" aluminum plate backed with a 1/4" thick aluminum spacer. The handlebar clamp bolt was replaced with a similar one, but 1/2" longer. The wiring disappears into the headlight shell where it takes its readings from an auxiliary line I ran for bar heaters and GPS. Voltage is a digital display. But there is a color coded ring (red, orange, green) that circles the display and let's you know at a glance if you are charging properly.

No more mid stretch rotor, brush, or pilot bulb failures that leave you running until you aren't. Plenty of warning and the Odyssey 925 will get you nearer a resolution.
Title: Re: T3 (etc) Voltage Monitoring (No Surprise)
Post by: bigbikerrick on April 11, 2026, 07:14:16 PM
Thanks for that. I like it for my ural,as well as convert.   :grin:
Rick.
Title: Re: T3 (etc) Voltage Monitoring (No Surprise)
Post by: n3303j on April 11, 2026, 07:19:30 PM
Thanks for that. I like it for my ural,as well as convert.   :grin:
Rick.
My Ural has the Denso alternator for the last 90,000 km. So far it has been totally trouble free. Its the 2 Guzzi that prove power isn't free.
Title: Re: T3 (etc) Voltage Monitoring (No Surprise)
Post by: Moparnut72 on April 11, 2026, 08:41:35 PM
I am going to use something like that on the T3 I am fighting. I have a gauge on my new 850 just to keep an eye on things when I am using my heated gear.
kk
Title: Re: T3 (etc) Voltage Monitoring (No Surprise)
Post by: n3303j on April 14, 2026, 09:03:57 AM
Spring is here and the flowers have riz...

AND I've finished installing my Greg Bender harness in my 50 year old T3. New wires everywhere! Maybe the end of the electrical gremlin that would sneak out and nip me sometimes when I'd press the starter button and nothing would happen?

It was a fun winter project of exploration and education. I installed one sub-harness at a time and then tested functionality. If something was wrong it would be with that part of the installation. Lots of photographs showing color and location helped getting it right. Final step was the main harness, removed and replaced one section at a time. In the end it all works including my city and parking lights on original switches.

I had Bender add one wire to the main bundle for auxiliary devices (voltmeter, heated grips & GPS). This ran from the fuse block to the headlight. I had a relay in the headlight shell to kill the auxiliary devices at "key off".I moved the relay back to the fuse block area using the block as the source for all switched and "always on" connections. Looks a lot cleaner inside the headlight now. Actually some room to work.

As long as I was in the bowels I changed the air filter. PITA as usual. Seemed to run a bit happier though. Bet my gas mileage goes up. I did discover that the whole air filter, breather box, airbox assembly could be removed and replaced assembled  by withdrawing it to the rear if the seat, tank, carbs and battery were removed first. Sure beats taking it out piece by piece.

Now it's time to ride!
Title: Re: T3 (etc) Voltage Monitoring (No Surprise)
Post by: Antietam Classic Cycle on April 14, 2026, 11:24:18 AM
One thing I always get from Greg for all Tonti-frame and small-block Guzzis with the Bosch charging system is his "bootstrap harness". That way I can run an LED charge warning light and the system still charges. Good even if one is still using the original incandescent bulb (or no light at all).
Title: Re: T3 (etc) Voltage Monitoring (No Surprise)
Post by: n3303j on April 14, 2026, 12:34:18 PM
One thing I always get from Greg for all Tonti-frame and small-block Guzzis with the Bosch charging system is his "bootstrap harness". That way I can run an LED charge warning light and the system still charges. Good even if one is still using the original incandescent bulb (or no light at all).
I really like the original bulb as a resistor. I replaced the console 10 years ago and all indicators are visible in daylight. Missing bulb at "key on" indicates bad bulb or open rotor circuit. You always have a "spare" bulb available in the console. Just a couple less connections to go intermittent.