6219_Rules Posted July 15, 2003 Share Posted July 15, 2003 Hello everyone!My son's 72 Eldo has been working marvelously including the Twilight Sentinal, until the last night or two when the delay has stopped working explicably!The Sentinal works turning the lights on at dusk as it was designed to do but upon shutting the car off, the lights simply turn off. What could be the problem? Any ideas on what one can do to repair it or will it need a new switch unit? Any help would be greatly appreciated. <img src="http://www.aaca.org/ubbthreads/images/graemlins/laugh.gif" alt="" /> Link to comment Share on other sites More sharing options...
6219_Rules Posted July 18, 2003 Author Share Posted July 18, 2003 I got this information from the CLC forum in the spirit of disemination of information. The amount of delay is controlled by a rheostat at the headlamp switch. The higher the resistance, the longer the lights stay on. This controls the amount of "bleed off" in a capacitor that feeds the base of a transistor that keeps the lights on. Knowing this, if there is no delay, then there will be little or no resistance in the control circuit, the capacitor is defective. or the transistor that it contols is defective. The capacitor and transistor are part of the controller under the das and are not servicable. You can check the wiring to the switch for grounding, the rheostat in the switch, but most common cause for failure is the controller. Before you do this, though, make sure the power and grounds are OK. The proper shop manual is the best bet here for diagnosing the system. Mike CLC # 19861I looked under the dash, and just below the light switch is a white, plastic box marked Twilight sentinal. This is the box that holds the rheostat and capacitor. I need to replace this one and it should work. <img src="http://www.aaca.org/ubbthreads/images/graemlins/cool.gif" alt="" /> Link to comment Share on other sites More sharing options...
Guest Posted July 23, 2003 Share Posted July 23, 2003 Randall:Suggest if you are not already a member, join the Cadillac-La Salle Club. I was a member for many years - found they have a well-organized "net" for assisting people with technical problems. Many of their members, and much of their "focus" is on the post "classic era" cars - that would probably be the most productive source of info. for you on non-classic Cadillacs.Perfidious Link to comment Share on other sites More sharing options...
6219_Rules Posted July 23, 2003 Author Share Posted July 23, 2003 Already done....that is why I have my CLC member number in the footer of my messages. So far nothing on where to get them...but I have sources all over the net so I should be able to find one. Link to comment Share on other sites More sharing options...
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