1975 850t

[850brian]

Having trouble finding what fuses I will need. Ordered a new fuse box yesterday because mine was all corroded

[Antietam Classic Cycle]

I got one of the black box ones.

The "black box ones" have about a 50% good/bad rate in my experience. This is the one I use, haven't received a bad one yet. https://www.amazon.com/gp/product/B07MJGC28B

Having trouble finding what fuses I will need. Ordered a new fuse box yesterday because mine was all corroded

If you are looking for the original style fuses, they are "GBC" type. Used on numerous European autos (Mercedes used them into the '90s). https://www.amazon.com/50Pcs-European-Automotive-Assortment-Bakelite/dp/B07F2739HM

[John A]

Those fuses usually can be found at auto parts places being called VW fuses. They have a habit of buildup on the ends so I periodically rotate them without taking them out of their clips.

[Turin]

I get my bullet/torpedo fuses on amazon.

you can buy a lifetime supply!

https://www.bing.com/shop?q=weider+200+pcs+car+fuses+european+automotive+fuse+assortment+kit+5a+8a+10a+16a+25a+for+european+classic+cars+old+style&FORM=SHOPPA&originIGUID=7E0B19E2A7B54C0BAE5B24E811BA52B7

[850brian]

Thank you for the replies I will report back!

[850brian]

Those fuses usually can be found at auto parts places being called VW fuses. They have a habit of buildup on the ends so I periodically rotate them without taking them out of their clips.

The green ones?

[Antietam Classic Cycle]

Another source for the fuses (and much more):
https://www.thisoldtractor.com/for_sale_wiring_harness_tonti_850_t.html

An 850-T should have six 16 amp fuses, which are usually red.

[Moparnut72]

O'Reillys has those in stock, at least in my local store. I was surprised to see them when I was getting some "regular" fuses for my RV. I hadn't seen one of those since I had my R75/6. 
kk

[850brian]

Awesome! Thank you.

[850brian]

Still no luck w new flasher, fuse box and fuses

[Antietam Classic Cycle]

Still no luck w new flasher, fuse box and fuses

Time to go through every connection on the bike, making sure they're clean and tight, all of the ground points as well. 

[850brian]

So I installed a new main harness which fixed the tail light problem but now my head light is not working. Does anyone know where this wire should be?

[Antietam Classic Cycle]

So I installed a new main harness which fixed the tail light problem but now my head light is not working. Does anyone know where this wire should be?

Just guessing, but blue is used for the charge warning light circuit. If that's what it is, then it connects at the diode board/rectifier.

[850brian]

Update. I got the new harness installed and it fixed my problem! Only my headlight worked before I installed it. Now I have tail light dash lights and turn signals, however...... now I don't have a headlight? Any suggestions on what to look for?

[Tom]

Take a multi-meter and check for power to the headlight.  Work your way back from there.  Could be corrosion in the ignition switch if you still have the hem one.  Check power in/out of the switch.  The oem ignition switch can have corrosion and/or bakelite build up on the contacts.  Be very careful when prying up on the metal tangs that squeeze/hold the switch together.