windstar light problems

Howdy gang. I have a 1998 ford Windstar with a 3.8 V.6 When I turn my lights on and drive it my lights flicker. I have checked all my grounds that I no of and my connections while driving my lights go dim when I let off the gas. but do not flicker any more. when I accelerate they begin to flicker again. I've had the alternator check and all is good. I have no clue. has anyone else had this problem? Any help will be much appreciated. PS thanks for allowing Me to join this awesome site...

Assuming your '98 is wired like my '99 (and I think it is) ... all exterior lamps get a "constant" 12 volt supply, and are switched on the negative or ground side. You could take an alligator-clip jumper and jump the negative side, at the lamps, directly to chassis ground. This should keep the headlights on anytime the system is "on". Then you could take a drive and see what happens ... this will let you know if the problem is on the ground or positive side.

Thank You 12Ounce for Your quick reply. I forgot to mention that its not only the head lights but all the lights inside and out that flicker. been at this a while now and just can't figure it out. it's driving me crazy. I'm afraid that they will go completely out soon. but I will surly try Your suggestion and cross my fingers lol