Well, yeah, if you don't gots metal to crunch lock washer teeth into, then
ALL ground wires need to be brought out into the open for daily visual and
mechanical inspection. I bet, though, that if there is sufficient metal to
support the relay, there's sufficient to carry the small amount of current
that the coil needs. Once you've cut through the paint and scales and
barnacles and rust, that is.
--
Mike "Rocket J Squirrel" Elliott
84 Westfalia: Mellow Yellow ("The Electrical Banana")
74 Utility Trailer. Ladybug Trailer, Inc., San Juan Capistrano
Bend, OR
KG6RCR

On 8/25/2009 4:39 PM mark drillock wrote:

> Sure thing, that could work. Those rust bucket vans from CA though are
> subject to corrosion in a way not seen so much round heah. So I suggest
> running a wire with the chassis grounding end up where it can be seen.
>
> Mark
>
> Rocket J Squirrel wrote:
>> Couldn't ya put a paint-cutting washer between the relay case and the
>> chassis? An outside-star lock washer will dig its little pointy teethy
>> things right into the metals. Properly-torqued, it will be a gas-tight
>> connection.
>>
>> Like this guy:
>>
>> http://product-image.tradeindia.com/00119865/s/0/Star-Washer.jpg
>