Hello again everyone. I took apart my 97 toyota rav 4's original radio to modify it by adding bluetooth and a line in. I got the lines traced for the output of the head amplifier, and if I split those wires, I could inject my own audio into the radio, and it would play.
However, this ONLY worked if I had a cassette playing. Once it ran to the end of the tape or the tape was removed, it stopped playing my injected audio.
So I took apart the tape assembly and removed all the boards, motors, and switches from it. Then I just placed them on a plastic sheet and played with the switches until it stayed in tape mode. I got it to stay in tape mode by holding down two switches, but the eject motor and spindle motor just pulse on and off. I figured that it would be okay as long as it played audio... but it doesn't.
Anyone have any suggestions for me to try to get it working without a tape in the cassette desk? I wanted to completely remove any moving parts, which is why I didnt just use an infinite tape. The mechanics in this thing are about dead anyway, they barely work and make a lot of noise.
Below are pictures of the front and underside.
Toyota A56405
Model 86120-AC010
Ref CQ-LS7410Z
Any ideas? I can't find a service manual anywhere