I'm totally in the dark (no pun intended) about how these systems interlock with the stock dimmer and headlight switchs, but I know that, at least in some years, the dimmer switch had to be left on "high beam" position for the automatic dimmer to operate. If the stock dimmer switch were left in the "low beam" position, the automatic dimmer did not work at all, and the lights stayed on low beam. This means that you could still be suffering from the oxidized dimmer switch malady, so as you say, I think it is wise to do the 187 step fandango on it before replacing parts. Similarly, (and in contradiction of something someone said here the other day,) the Twilight Sentinel will work correctly only if the main headlight switch is OFF (not "on"), at least in the 1968 models. Dick Benjamin ----- Original Message ----- From: <FltSgt@xxxxxxx> To: <mailing-list@xxxxxxxxxxxxxxxx> Sent: Saturday, March 08, 2003 12:43 PM Subject: Re: IML: Parking Lights Yes, Head Lights No > Uncle Dick > > I do have the dimmer package. Even so I'll still do the 187 count. After I > put the front wheels back on. > > Rodger & Gabby > 51 degrees in Colo Spgs > >