Took bike to mechanic for tire an after he test drove it an ever since bike wont charge the baterry an in back of bike where tail light is there is two black wiring plugs that look like they should go together but they cant reach each other an both ends are male like he took out the loop so it wouldnt charge so i would have to bring it back to him so he can make so money of me ya no. so i need to see diagram so i can know for sure if this has happened.

That light indicates a problem in the charging system of the car. have it tested for correct operation and charge rate.

I suggest O'Reilly's checked more than your mechanic did. Just because he says it is chrging does not mean he checked the diodes, which if bad allow the battery to drain whenever the vehicle is not running. Replace alternator.

The electrical problem of the other bike could've very easily fried your battery, too. It could have enough to turn over but that's it. Take your battery out, take it to a car parts store, have them load test it. It could just need a reconditioning and charged up.

DISCONNECT NEGATIVE CABLE AND START BIKE IF WORKS RECONNECT NEG AND REV AT HIGH SPEED TO CHARGE BATTERY YOU NEED TO CHECK RELAYS FUSES TERMINALS WIRES MALE TO FEMALE ENDS NO CONTACT ETC.

Battery light on ! alternator isn't charging . Test the alternator electrical circuits .Main cable on the back of the alt. should have B+ voltage .Pin # 3 at the connector on the alt. should have B + voltage - fuse F10 10amp under hood fuse box supply's B+ to pin #3 . Pin's 1 & 2 at the connector go to the PCM - engine computer . This is a computer controlled charging system .
Ford PCM controlled alternator testing

its not got a feed for charging the battery you need the right part to fix it, swoping bits from an older bike some times realy wont work out for you,, get one from the same moddel and year of bike and its then just a case of a strate swop over,,,
you can fit a lorry wheel on a car can you?

Your battery is most likely the cause. The tail light and dash light do not draw much juice from the battery. However the headlight and starter are a different story. Are you absolutely sure you turned everything off before you took your break? If you are and you don't ride your bike a lot you should get a trickle charger for it. Use it when not riding. It will prevent you battery from completely losing it's charge thus protecting the battery.
If you do ride often then you should have the battery tested. You may need a new one. Remember that once a battery has been drained too low, permanent damage can occur.

This is a known problem with the REAR struts, but not the front. This repair under warranty will have to be decided by the DPSM (District Parts Service Manager) serving that dealership. Good Luck.

Yep.... the tired old battery may have cooked the alternator. If your lucky , maybe it is just the belt. Could be loose wire , or dirty connection on back of alternator too.
Alternator should not be THAT expensive , and an 85 caddy should be easy to get at alternator.
If a mechanic has quoted you lots of $$$ , check with another mechanic. Stay away from chevy dealership , or any dealership for that matter. They waaaayyyy overcharge. If their book says it is a 2 hour job , thats what you pay for , even if it only took them 20 min.

Sounds like the battery may be bad. You could remove it and take it to a mechanic or parts store and have them test it for you. Mechanic might charge you 15bucks or so. Most parts stores will test it for free and gladly sell you a new one.