hzj75 troopy

My stereo ACC wire (red one) is getting 6V constantly and then jumping to 12V when the car is on. How do I troubleshoot? I just wired in a new cheap stereo using a Metra Wiring Harness. To my own surprise, everything worked great right away! I could turn the cruiser on and off and the radio...

1992 Toyota Landcruiser Troopy. I bought it while living in Costa Rica for a year. Importorted it last fall when we moved back to the US. Drives great and well well-maintained. Was driven daily until this year. Had service work done at the ARB shop in San Jose, CR. Has the original motor and...