He found the power block. Thick red line. Battery Positive. He looked at the harness dangling from the dashboard. He needed a multimeter. He grabbed his tool, pressing the black probe to the metal door frame and touching the red probe to a thick blue wire with a yellow stripe hanging from the dash.
If the vehicle has the JBL system, a simple wire harness is not sufficient. You require an "Integration Interface" (such as PAC TOY-LAN or similar). The 86120 in these cars communicates digitally with the amplifier in some later models; bypassing the amp requires running new speaker wire to every door, which is labor-intensive. manual toyota fujitsu ten 86120 wiring diagram
The series, manufactured by Fujitsu Ten , uses a standardized Toyota wiring harness configuration. While specific sub-models may vary slightly, most utilize a two-plug setup: a 10-pin main connector for power and front speakers, and a 6-pin connector for the rear speakers. Standard 10-Pin Power & Front Speaker Connector He found the power block