All my searches for tachometer issues came up with threads about adding aftermarket tachometers. Mine has one on the dash, stock, but it's not working. The needle is always below 1000 RPM for short drives. It barely ever moves. When I've been on the highway doing 100+ km/hr for 30 minutes, it will slowly start to rise, but never above ~1500. Once it's warmed up like this it will generally move proportionally between 0 and 1500 in sync with the RPM. Any ideas? Some basic research seems to indicate this signal typically comes from the alternator rather than a dedicated sensor, on most cars. The fact that a warm engine means the needle moves more suggests to me the problem is probably in the vicinity of the engine, rather than a problem with the gauge itself or the wiring in the front half of the vehicle.