[A/S] !2 Volt Question

["Don Hardman" <donhardman@xxxxxxxxxxxxx>]

I am installing my Jordan break controller and have everything hooked up and
mechanically it looks fine. I plugged in the trailer wiring harness that
came with the 2004 Suburban in  slot in the fuse box under the dash,
connected the red to red and blue to blue wires as instructed. I have a
question about the white ground wire from the brake controller. Accring to
the instructions it reads:

>Using the appropriate hardware, connect the white wire (ground) to the (-)
>terminal of the battery. (Warning units which are not grounded to the (-)
>terminal of the battery may not operate, or operate cording.

Does that mane that I should actually run a wire direct to the (-_ terminal
on the battery through the firewall, or can I attach The ground wire to
metal somewhere under the dash.

Thanks folks, have a happy and safe Memorial weekend.

Don Hardman