2002 Silverado No low beam follow up No ground to lowbeams

Hello again So heres the deal (NO Ground to low beams)
I went out with my multimeter in hand today and found that the
headlights have no ground on the lowbeams
now my most logical thought was to just splice in a new ground, so I
figured the highbeam ground was very close so why not use that
(Right?) Wrong I was then suprised to learn that when I spliced into
the high beam ground wire and tried the lowbeams all the headlights
now came on high and low beams .
So I figured that the grounds must run through a relay of some sort at
this point so I disconnected the splice I made and it is back to a no
headlight on low beams.
But here is my question can I just run a new ground wire spliced into
the lowbeam ground wire and ground it to the body of truck (because
lowbeams will work when grounded to the body I tested it and yes they
worked as they should (but I thought the wire I was using got a lil
hot so I did not leave it connected to long).
Or are these headlights designed by GM to be grounded only through a
relay to avoid burnout?
Or can I go ahaed and just use the spliced in ground and use the low
beams safely the way the new ground is?
Thanks again for all who respond

On Nov 4, 1:54?pm, "imatool...@aol.com" <imatool....DeleteThis@aol.com> wrote:
> Hello again So heres the deal (NO Ground to low beams)
> I went out with my multimeter in hand today and found that the
> headlights have no ground on the lowbeams
> now my most logical thought was to just splice in a new ground, so I
> figured the highbeam ground was very close so why not use that
> (Right?) Wrong I was then suprised to learn that when I spliced into
> the high beam ground wire and tried the lowbeams all the headlights
> now came on high and low beams .
> So I figured that the grounds must run through a relay of some sort at
> this point so I disconnected the splice I made and it is back to a no
> headlight on low beams.
> But here is my question can I just run a new ground wire spliced into
> the lowbeam ground wire and ground it to the body of truck (because
> lowbeams will work when grounded to the body I tested it and yes they
> worked as they should (but I thought the wire I was using got a lil
> hot so I did not leave it connected to long).
> Or are these headlights designed by GM to be grounded only through a
> relay to avoid burnout?
> Or can I go ahaed and just use the spliced in ground and use the low
> beams safely the way the new ground is?
> Thanks again for all who respond
I have tracked the problem to the low beam ground
But can not for the life of me trace the ground back to it point of
oringin.
I was wondering if I could just jump in a new ground off the frame of
the truck?
I did a test wiring for a temp ground wire and the headlights worked
fine
I am just nervous about jumping in a direct ground just in case like
you said there is 1/2 voltage involved.
But when I placed a volt meter to the positive lead to the bulb and
then ground the other lead to the frame and I did get 11.79 volts (12v
lets say correct)
I can not see why I can not just replce the ground wire at this point
I would cut the old wire and install a new ground and see what happens
\
any ideas Thanks again