well my friend had this problem with the defoggers not defogging and he had me post a topic about it and if any1 knew how to fix it, well he answered his own question and I posted it here as well and C4 Gen, hope this helps atleast one person

Try this:
First, take out your circuit breaker from the fuse panel for the rear defogger. Swap it with the circuit breaker above it, which is the rear hatch release. Try your rear hatch release if it works u know the circuit breaker is ok. Reinstall in original location. Then run a ground wire from negative side of your battery and hook up to your test light. Turn ignition to on position and hit your defogger switch. Goto passengers side of hatch and put test light on positive wire at bottom of the strut. If it lights you know u have power to there. Touch tester light to top side of the strut on the same side to check power to that. Then goto drivers side and try the same thing there. I found that all my grid lines lit up bright which the service manual says indicates an open ground. Sure enough i found the top strut on drivers side had poor connection and I wasnt getting the power through the strut to the negative wire on bottom of strut. When I checked all four strut connections had corrosion even though this is a garaged car. Anyway once I cleaned it up and tested it with the light again you could see the light start bright on passengers side grid line and slowly get dimmer as you worked toward drivers side. I tested it out by fogging it up and it clears up beautiful, give that a try!
:cheers:


[Modified by Micky T, 12:00 PM 3/5/2002]