|
add on to Delco radio
The way the slave units used to work in GM trucks, was (for example a cassette) was when you pushed a tape into the remote tape deck, it sent about a 4 volt (constant) to the cpu/amp along with L,R & what they called lo ground ( for the audio system only) hi ground was the chassis (battery ground). The 4 volts muted the radio and inserted the tape preamp signal. Giving the cpu/amp a 4 volt feed, you could substitute any preamp signal to the system, or add a switch for several different units. The terminals in the early-mid 90s were stamped by number on the cpu/amp housing. Best of luck.
|