Daytime Running Light Module - 1990 300ZX Z32

The daytime running light module for the Nissan Z32 platform is primarily found on Canadian-specification 1990-1996 300ZX models, where federal mandate required DRL functionality. This solid-state relay module typically reduces high-beam headlamp voltage to 80-90% intensity during daylight operation, controlled via the engine-running signal. When junkyard hunting, search for part numbers 25380-01U00 (early production) or the superseded 25380-01U01, often mounted behind the driver's kick panel or adjacent to the engine compartment fuse box near the battery. Verify the four-pin connector integrity, as corrosion commonly damages the harness near the firewall. Testing is straightforward: with the engine running, the module should activate high beams at reduced brightness without full current draw. If DRLs are absent or the unit clicks continuously, replacement is necessary. Note that 1994-1996 facelift models may utilize revised mounting brackets compared to 1990-1993 chassis. US-market vehicles rarely shipped with this module, though dealer installations exist. Always match the casting marks—typically Denso supplier codes like 153800-XXXX—alongside Nissan OEM stamps to ensure compatibility across both VG30DE and VG30DETT engine variants.