judging by the way you asked your question, my guess is that you don't know
much about electronics. That's fine. You had enough sense to ask the question
BEFORE you damaged something.

Here's the short answer.
take the right + output of your receiver, and connect it to the + output of
your right front and right rear spearker.
do the same with the right - lead.
Now do the same on the left.

This is called parallel wiring. It cuts the resistance value of your speaker
circuit in half, to two ohms (assuming you are using 2 typical aftermarket
loudspeaker pairs)

Most newer receivers are rated at "2 ohm stable" if this is true of yours,
you'll be okay. In fact, you'll draw more power out of your receiver.

Now, if your unit cuts out as you turn it up, there is a simple fix. This fix
WILL cause you to be able to draw less power, however.

AT YOUR DASH LOCATION, it is essential that you are able to determine the wires
dedicated to each speaker pair. It is equally essential that you know which is
+ and which is - . If you've bought a plug-in adaptor this should be much
easier. that adaptor will have a purple, a green, a gray and a white pair of
wires. The black striped one in each pair is the negative wire.

Take the two pairs of wires for the right speaker. Connect the right front
negative speaker lead to the right rear positive lead.
Now connect your receivers right + output wire to the right front + speaker
lead, and the receivers right - output wire to the right rear - speaker lead.
Do the same for the left.

This establishes a series circuit, which, while reducing the radio's power
output, is almost guaranteed to work.


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