Some models with auto trannys have an extra wire with space connector at
the starter. It attaches on the starter very near the same connection as
the the other one. The larger red/black is the main start voltage from
the key switch and neutral safety interlock. The smaller red/black sends
that signal back up front for use by a couple of non-essential circuits,
namely the factory aux battery relay and the brake warning light.

Mark

John Bange wrote:

>Today while making up the last few remaining wire connections in the
>engine compartment, I ran into something puzzling. The wire harness
>feeding the starter solenoid has TWO red wires coming out of it: a
>thicker gauge one with a black plastic female spade connector and a
>thinner one with a white connector. On top of the solenoid I can only
>feel one connection point.  The starter works with the thicker one
>connected. My question is, what's the other connector  for? Is there
>some place up there I can't see where this should be connected?
>Everything seems to work without it.
>
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