Question about 2008 Cadillac Cts
Using a multimeter, check if you have voltage at the socket with the lights on. If you have voltage (12vdc), I'd suspect a bad bulb.
Using a multimeter with the lights off, you can also check for continuity of the bulb, wiring, & switch.
Posted on Nov 19, 2014
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Posted on Jan 02, 2017
in this case make sure you have voltage going to the low beam lights. 12 volts. you need a volt meter. if you do not have volatge you have to check and make sure power is going through the fuse. a bad fuse will be broke, but you can have a good fuse with no power going through it. if you have power going through the fuse you have a wiring open somewhere between fuse and whatever is between the headlight connecter.
plz check and get back i will keep checking on here on and off.
Posted on Feb 09, 2009
Ill guarantee you have an electrical short on the left side of the headlight switch,circuit.From here its immpossible for me to go any further.Good Luck.,Get A Wiring diagram.
Posted on Apr 18, 2009
Shannon, you did not state if you checked for voltage at the fuse location-or better yet at the bulb location-
If a connection at the relay that feeds power to the low beams has come loose, then the low beams will stay out. Suggest that you locate the headlight relay (in a box under the hood) and verify that it is operating. If an assistant can operate the headlights while you listen (and feel) for relay operation, then you can eliminate that as an issue. Next would be the output of the relay (contacts could be bad) - and if you cannot open the relay to verify good contacts, then purchase a replacement relay (possibly from a junkyard) and plug that in.
Remember, the relay supplies the power to the headlights.
Posted on Dec 15, 2011
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