Re: More Stereo Installation & Wiring Expertise Needed
From: Jim Conforti (lndshrkxmission.com)
Date: Sat, 11 Apr 2009 11:34:07 -0700 (PDT)
Robert,

This one is easy.

Get a standard automotive relay - either a 4 pin or 5 pin Bosch Relay
and a matching socket and terminals.

The relay terminals are numbered.

Terminal 85 should go to vehicle ground

Terminal 86 should go to a any ignition-switched (fused) power.

If when you turn the car on - the relay goes "click" you have that part right.

Terminal 30 goes to a (fused) source of constant power - like the current existing radio power.

Terminal 87 goes to the radio power input.

When you apply power across terminals 85 and 86, terminal 30 is connected to 87 and
your radio turns on.

A five pin relay will also have terminal 87a - which does the opposite - it is connected when
power to 85/86 is off - and disconnected when it is powered up.

Hope this helps,

Jim

Results generated by Tiger Technologies Web hosting using MHonArc.