On most automotive electronics, there are two wires to the +12v battery.
One, the higher current wire carrying the bulk of the load, usually the
amplifier and motor supply. The second lower current wire is usually
used to power clock circuits, backlighting and memory circuits.

In your case, a resistor was used as a fuse. 1k seems a little high but
depending upon the load current, might suffice. Shorting it out is a
quick fix but I would worry if the outside temperature got hot again.

Were you speaking of a blue body of the resistor? If so, it sounds like
a metal film resistor. Are you sure it was a 1k resistor? 1% precision
resistors will have four significant bands.
Rick


Augusto de Conto wrote:

> Hi all
>
> I have a Pioneer DEH-836 CD Player in my car.
> In a very hot day it stoped to work.
>
> The problem was:
> There is two wires conected to the batery.
> An orage, with a 10A fuse and a black box
> that probably is a filter.
> And a red, with a 1k resistor with back blue.
> The 1k resistor was opened.
>
> The questions are:
> What is blue on a resistor (not 6)? 1/2W ?
> How did the resistor opened, and what is
> this used for?
>
> The point is that the man that fixed just
> pulled out the resistor and short circuited
> the wires.
> It worked again, but I don't like this
> procedure.
>
> Any idea?
>
> Thank
>
> Augusto
> augusto@automacao.eng.br
>
> --

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