US GTS Trueno stereo wiring

[Ivan141]

Well, only plex and osmosis could know that about US models, but often these connectors are cut by previous owners. If you have a multimeter you could check for power, contact and lighting feeds by measuring voltages on the connectors. Looking at the connector layouts I would hazard a guess that the small connector is for power supply and dashlighting etc..(1 ground, 1 permanent 12v, 1 contact 12v, 1 lighting).
The bigger connector has exactly 8 connections so that corresponds nicely to 4 speakers.
You cant damage the speakers by experimenting, so just connect the radio (after checking what each of the power feed connectors exactly is, sometimes the radio wont play without contact wired correctly).
Then use two speaker outputs on the radio and just keep searching for a pair on the connector where you get sound.
Not so difficult I suppose...
But I do urge you to check for voltage on all connectors with the contact on before you do anything else...