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how does the speedo go to ground?

Charging System, Wiring, Lighting
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kennedy759
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how does the speedo go to ground?

Post by kennedy759 » Sun May 24, 2020 1:01 pm

67 ca77, getting ready to paint the headlite bucket, need to know where the speedo pics up ground so the lites in the speedo work, since only one wire goes to each.
67 ca78 Dream
82 cb450 Nighthawk
05 kfx700
07 mule
97 vette

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Tim Allman
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Location: Guelph, Ontario, Canada

Re: how does the speedo go to ground?

Post by Tim Allman » Tue May 26, 2020 9:07 am

It is grounded by contact with the headlight case and, more reliably, through the screws that hold it in the case. If you are having a problem there's no reason you couldn't run a ground wire into the case along side the wire harness.

DJM
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Location: Chesterfield UK

Re: how does the speedo go to ground?

Post by DJM » Tue May 26, 2020 11:46 am

On the CB models there is a green earth wire from the back of the speedo case onto a tag on the headlight rim which itself is grounded. You will also pick up decent grounding through the speedo cable itself once you have it fitted.

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