Use this article if…
Use this when the opening is ready and you are connecting the PVS Toyota loom - constant, ACC, earth, and speakers - to match the supplied diagram. If you have not confirmed dash fitment or boxed parts yet, start with install before you begin; if the unit is completely dead after wiring, go to power troubleshooting rather than swapping wires at random.
Quick answer
Dead screen or dead speakers right after plug-in is most often wrong constant, ACC, or earth versus the PVS LC70 diagram, or a plug not fully latched - follow only that loom sheet and re-seat every terminal before assuming a faulty unit.
Problem
- You need to connect the PVS Toyota harness to power, earth, and speakers correctly.
Symptoms
- Harness colours do not match a random “universal” diagram.
- No response after plug-in.
Cause
- You are also planning amplifiers or factory amplifier retention, which changes tap points and turn-on wiring.
Fix Step-by-step
- Use only the PVS LC70 loom - follow the PVS diagram in the box (see fascia install if the radio is not out yet).
- Constant 12 V, ACC, earth to clean metal.
- Keep accessory taps fused; do not overload the radio circuit.
- Re-seat plugs; no stray strands.
- Set conservative amp gains while learning the unit.
- No sound from speakers? No audio troubleshooting.
Notes
- Dead unit: Power troubleshoot
- First boot: First-time setup
- Cameras: Camera wiring
- Steering keys: Steering setup
Still stuck? Send us these photos
- Vehicle: model, series, year, and cab/body variant if it changes the loom.
- Photos (wide + close-up): vehicle-side factory connector and the PVS harness labels/colours at the radio end; main plug latched home.
- Earth: photo of the earth point you used (clean metal, ring terminal).
- Extras: photos of any factory amp retention, line-output, or patch leads - not just the main quadlock area.
- Text: what works vs fails after power-up (dead screen, no speakers, both, etc.).