Hi All,
I got a 2000 S10 I drive that has Automatic Headlamp Control and I can say I've never used the headlights switch for evening driving. The system is that good. I have a 99 Astro only with DRL and in the evening I'm driving around town forgetting to turn on the headlights especially on lighted streets where you don't notice if the dashboard lights are off. Anyway I asked Mister Goodwrench if they could do a retro conversion. They said there is 'no kit'. The sensor for the AHC is simply mounted on the defrost grill for 2000+ Astros so no dashboard change is required. It seems to me all it would be is a sensor and control box inserted into the existing headlamp circuit. I know the domelight switch is also involved because 4 presses turns off AHC and 2 back on. It's enough to make me want to trade in the 99 for something newer but I'll amost guarantee there is no difference in the wirings circuits except for the addition of the AHC. The only interior difference between my 99 and a 03 is knobby thumb wheels for the climate controls and the sensor on the defrost grill.
Thanks, Jim