Recently I've been into the idea of hooking up a Bluetooth receiver to my car stereo via my car radio's aux input. I got a Bluetooth receiver module from an old Bluetooth speaker that I had laying around. I disconnected to speaker and, not surprisingly, it was a mono speaker output on the circuit board. I took an aux cable, cut it open, wrapped the left and right together and soldered it to the positive output and soldered the ground wire to the negative output on the board. I plugged it into my car, connected to the module with my iPhone and played Spotify... It worked, but audio only came through the left side of the stereo car system.

My question is: Is there anyway to play the mono sound through both stereo speakers?

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    \$\begingroup\$ Duplicate? electronics.stackexchange.com/a/241614/104462 \$\endgroup\$
    – Bradman175
    May 2 '17 at 22:51
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    \$\begingroup\$ Sounds like you tried to do the right thing. Are you sure you connected the wires correctly? \$\endgroup\$
    – Finbarr
    May 2 '17 at 23:09
  • \$\begingroup\$ It's not a duplicate, I'm not sure the answers to that question helps me directly \$\endgroup\$ May 2 '17 at 23:18
  • \$\begingroup\$ I'm 90% sure that I connected it good... The aux cable had 3 wires inside(red, white and blue). I assumed that the red and white were left and right connections because my old tv had audio jacks that were those colors. I twisted the red and white wires together and connected it to the positive mono sound output in the board, and the blue one to the negative... Sound only comes through the left speaker in my car. \$\endgroup\$ May 2 '17 at 23:25
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    \$\begingroup\$ I wouldn't assume anything about the colours. Try red and blue together to + and white to - instead. Or use a meter to check which colour is which. \$\endgroup\$
    – Finbarr
    May 2 '17 at 23:30