You'll either have to know the car the socket came from or do some
multimetering/visual inspection on the socket.

For the wiring on your '91, see here:
http://search.ebscohost.com/
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username: lib
password: access

Choose "Auto Repair Reference Center" from the menu at left, then locate
your car. The wiring diagrams are there.

Good luck.

Guess it depends how involved you want the circuit. I think honda
uses a relay for the cig lighter according to the diagrams. So, that
could account for the extra wiring. You might have the pigtail to plug
into a lighter, but I wonder if you have the relay on the car. If it
did,
it would probably be best to use an exact replacement with the proper
wiring scheme. But the usual run of the mill lighter just has a single
"+" connection. No relay is used. They just use wiring thick enough
to handle the current, and it's fused through the fusebox. So if you
didn't
have a relay, or are just lazy, you could just run a single hot wire to

a standard lighter, assuming you can get a ground at the lighter socket
frame. If not, you'd have to run a separate ground wire also.  I
usually
run wire straight to the battery. I've got a ICOM IC-706mk2 in my
accord.
I drilled a hole in the floor next to the firewall, and ran thick wire
direct
to the battery from the radio. Of course, my current draw is probably a

good bit more than a sat radio. I pull about 15-20 amps at full power
out
depending on audio level, etc.  If you do run direct wiring, make sure
it has
fuses. If you run both + and - wires, fuse both lines near the battery.
MK