Question about 1999 Cadillac DeVille

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My turn signal lights come on and just stay on they dont flash...i was told this was the flasher module where is it located?

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The 1994-1999 deville share the same body configuration except for cosmetic and enginge changes and this procedure works on the 1999 Deville. On my 1996 DeVille, the flasher is a 3 prong, square unit that is located just above the emergency break pedal on the inside face of the lower dash panel. To replace this flasher you should start by removing the 2, 9/32" bolt head retaining screws holding the black access panel just above the break pedal. Lay down on your back and look up inside the dash. You may find the round hazard flasher high just above your head, this is not it. Stick you hand up along the panel in front of the emergency break pedal just behind the trunk release button. Locate with your hand a 2 inch long square relay box and move it to unhook it from it's clip. (If the flasher is the factory flasher it will have a metal clip retaining it under the dash. Your new part will not have this clip.) Route the old flasher and wire down so that it hangs from under the dash. Now you can see it and disconnect it. There are multiple connectors, but only three of them line-up and actually have metal receptors inside the socket. Take note of the removal of the flasher so you are not confused during reinstallation. I think the other connectors are for additional features not needed in the US. Take the part to the parts store or just replace with new one. Relocate the flasher safely up in the dash in relatively the same place and make sure it won't move around. return the black panel to its position above the break pedal and replace the 2, 9/32" retaining screws. Delco part #3548813

Posted on May 20, 2011

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