Marks 4WD Adaptors manufacture manufacture a diagnostic test light for Commodore V6, and V8 EFI engines.

Commodore V6 and V8 vehicles are fitted with with a diagnostic test light to alert the driver of electronic component failure associated with the engine management system. Marks 4WD Adaptors manufacture a diagnostic test light, switch and loom that can be fitted into any vehicle fitted with a Commodore V6 or V8 engine requiring simple and quick engine management diagnostics.

This test light is fitted to our 1994 Hilux.