62 extra ground on valve cover

[Brian B.]

I have an extra (3rd ) ground wire on my passenger side valve cover. One goes to the wiper motor mount , another to the radio . I believe these are ok. The other one goes to a screw on the heater blower in the passenger side under the dash. Is this original , or did someone add this for reliability. If so , how should the heater be grounded.
Thanks ..

[John H.]

Re: 62 extra ground on valve cover

I have an extra (3rd ) ground wire on my passenger side valve cover. One goes to the wiper motor mount , another to the radio . I believe these are ok. The other one goes to a screw on the heater blower in the passenger side under the dash. Is this original , or did someone add this for reliability. If so , how should the heater be grounded.
Thanks ..

Brian -

That's a common modification to ensure a good ground for the heater blower. The production ground is through the sheath of the temp cable to the back side of the console plate, which is flaky at best.