Adding AUX and USB Inputs to 1988-1994 Trucks...need some help.

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1993GMCSierra

I'm Awesome
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Aug 1, 2012
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Surry, VA
Hi all,


I like my factory radio/Cassette w/EQ, and want to keep it in the truck, as it looks like it belongs there really well. However, as we all know, using the iPod Cassette adapter makes the sound awful in these.


What I want to do, is add an AUX input and wire it into the existing audio system. Then, add an USB input later, just for charging stuff.


Can someone supply me with the wiring diagram for the Delco AM/FM radio with Cassette w/ Digital EQ?


As far as wiring in the AUX input, where would I go about doing this? I read the article about doing it in the 1995+ ones, but not sure how much of it would really apply to the 1994- ones.


I don't know if it would be easier to splice into the wiring connector coming off the cassette player, or off of the radio itself.
 
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