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CB750 1978f fried electrics

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CornerstoneCB:
Hi there,

Can anyone help? I made the rookie mistake of jump starting my 1978 F1 from a running car! Now when i turn the ignition key there is no lights on or power anywhere. I only just bought this bike and it ran fine before this.

Can anyone tell me where to start? I read it may be the main fuse? Where is it located?

Thanks

kevski:
Either under the seat or behind one of the side panels.

CornerstoneCB:
Thanks kevski.

So i looked behind the side panel and there is a bank of five fuses in a box. Some fuses are missing but it started ok before the jump start. Is there one particular fuse to look for or is it likely that everything is fried?

😭

Bryanj:
Fuses should be labeled main head and tail. The battery could be totally goosed, are you saying there is nothing when connected to a slave battery?

CornerstoneCB:
Hi beyanj,

Originally there was power. I (stupidly) couldnt wait for a new battery to arrive! So i connected the +\_ to my car.

Now i have put new battery in and there is nothing. The ‘dash’ lights dont come on when i turn the ignition. Cant even jump start it.

?

Thanks

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