I have a 2004 ford taurus, and lately the power seems to be out of whack. I can see the dome light, head lights, and dash lights all flicker. This seems to be all the time now. It's like they are flashing. What could it be? Also, I have never had the transmission fluid serviced. Can I do it now? I have had several advices.

Check owners manual for your fuse box location. Remove and replace blown fuse. Normally located under driver side dash, passanger side dash or under your hood

It is possible the bulb in the dome light is burnt out or there is a bad connection @ the bulb. That is at least where you start. you will need to remove the dome light cover & wiggle the bulb while the door is open, or best to have two doors open to remove the possibility of a faulty switch. If it still doesn't flicker or start to work remove the bulb & inspect it to see if the filament is broken. If you can't tell best to replace the bulb & try again.
Please advise if you need more help.

Hi J, The ground connections are on each of the units. that is to say there is one power feed to the dome and another to the instrument panel. From there each door is separately grounded via each of the door switches. If one is rusted, contaminated or damaged and not operating correctly, it will cause the dome light and the door warning on the instrument panel to flicker. regards John

i just replace my GEM module and still no windows and dome light still flickers

heres a good link with pictures to remove the dome light,, On Fords ,, gently pop off the lens, the rest is pretty easy ,, just be sure and keep the wires from touching ground, or you will pop the fuse , the mounting screws are what makes the ground for the light fixture anyway , heres the link http://www.rangerforum.net/f35/how-disassemble-mustang-taurus-dome-light-paint-1255/

Is your dome light coming on? do the power locks work?
Your battery may be dead, or you may have blown a main fuse (under the hood)

bad ground at battery or chase.

courtesy light switches are incorporated into door latch.a good dose of WD40 or equivalent sprayed into latch sometimes works.check dimmer switch on dash.

hello first thing you need to check your fuses look for listing in your book under fuse panel then look for amperage of fuse it should be numbered in the book as well in the fuse box match the numbers same goes for your dome light goodluck

Owners manual should tell you where the fuse box is, I can't remember off the top of my head but it may be under the dash on the drivers side, there is also a box under the hood but I don't think the dash light fuse would be under there.

If the fuse is good the dimmer on the dash could have gone bad.