Lost all electrical....Please help!

[Da-Bubble]

Hey the Mad Mosquito is running fine but I lost all electrical. Horn, tach, lights of any kind don't work.

Not the fuses. Battery charges fine.

Ok...Go!

[CatatonicBug]

How do you know it's not the fuses? Did you test them all, off the bike? How about a ground connection in the headlight bucket?

[Da-Bubble]

Took them out and looked at them. Is that not good enough that I can see the little wire is still entact? I have dual aftermarket headlights. No ground in there, but has worked fine for two years.

[CatatonicBug]

Took them out and looked at them. Is that not good enough that I can see the little wire is still entact?

No! That is NOT enough. They can "look" ok, but still not be good. That is why we upgrade to the blade fuses, and ditch the glass ones.

[Da-Bubble]

I've had a new fuse block from TC for about a year....it's sitting on my work bench. Time to install?

[Ken Talbot]

The glass fuses, after 30 years of vibration, often come apart under the meta end caps. You look at it and it looks good. Grab the fuse by the end caps and twist/pull it, to see if one or both end caps come off in your fingers. Don't be afraid of breaking one. If you can pull it apart with your fingers, it was already broken and just waiting to fail at the most inconvenient time and place.

[Yard Dogg]

If it's not the fuses, then I think at least 3 of the wires going to the fuse box are brown positive wires. You could turn on your ignition and test them with a common light tester to see if there is power going to them. If there is power to them with the light tester grounded to a location of your choice on the frame, then you'll know it's a ground problem, or a bad fuse is not completing the circuit. So then test them while grounding to one of the ground wires in your wiring harness. If there is power, then you know it's a bad fuse. If no power, definitely ground problem. If there is no power going to those brown wires while grounded to the frame, then you have a power supply problem. Sounds like your trouble is coming from a central location if all went out at once.

Also, If you test those brown wires to the frame and to the ground wires in your harness and still get nothing, then try grounding to the negative battery post. It could be a main ground to the frame or engine to blame.

[rpgoerlich]

How about that one red wire (Main Power) coming from the solenoid that plugs into the wiring harness. Might check that plug.

I recently had the same thing happen to my 79SF when I was leaving from work... Found a loose connector in the headlight bucket for the switch. Cleaned and tightened the spade connectors in it. All better .

[mxmikie]

mine did that it was the ignition swtich

[fredintoon]

I've had a new fuse block from TC for about a year....it's sitting on my work bench. Time to install?

Hi Da-Bubble,
finally, a use for Valley Girl English:-
Well, duh?

[dbeardslee]

I had a similar problem with mine when I first got it. Wound up being the big white wire behind the fuse block. The insulation had burned off it and it was shorting out against the frame. JAT

[Yard Dogg]

Sounds like it's time to start going through everything. Last year when I got mine I cleaned and inspected the ignition switch and other switches. This year I started having various problems so I pulled the wiring harness and checked everything, cleaned my grounds and as many connections as I could. I still need to get a fuse box cause I'm running without. I have fuses hanging out the side of my bike. But they are chips.