how does the speedo go to ground?

[kennedy759]

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.

[Tim Allman]

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]

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.