I have a 99 150 and I noticed that the dash lights were out. I turned off the switch and the headlights would not go off. I disconnected the battery and pulled the switch to see if there was a bad connection or something and could not see anything obvious. I put the switch back and connected the battery and now the headlights go on and off properly, but now there is no dash lights and also no tail lights or parking lights on the first click of the switch. Im not sure where to go with this. Could anyone advise?
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Probably far too late, but it sounds like the switch itself has gone bad.