"stan" wrote in
ups.com:

Doug and Larry:

I have a few more questions. On the JBL unit I purchased, there are
two wiring harnesses which both end in 12 pin square plugs obvioulsy
suited for auto use. The owners manual states what to do with the
wires on one of the plug groups (black, red, yellow, speakers, ant.
etc.) The second group has a 12 pin plug at the end but only 4 wires
going into it. There are NO instructions as to what do do with that
set of wires.

1. Should I do anything with these wires or simply leave them alone.

Probably control and audio wires for external power amp for the big boy
toys. Just leave them open.


2. I hooked the two "+" wires together and connected them to a Radio
Shack 12 power supply and the negative wires to the "-" pin on that
power supply. I get a light on the face panel to light up but nothing
else happens. No buttons work, the faceplate screen gives no numbers
or indication that the unit is working. I was very careful with the
wires but does this indicate the unit is defective? Stan

Let's hook it to a real battery. I don't have any idea what power your
radio crap power supply can provide, but this unit may be drawing more amps
than the power supply can provide. The power supply may hum from this
load, screwing the DC to the computer circuits. Let's plug it into a real
battery....before we return it for a new unit that we WON'T plug into this
"power supply"....(c;