As mentioned, you have opened up to a few other issues, more the lower you go. I did a 5/7 and now my front tires are rubbing and I'm on the hunt for the profile that fits without running on the fender.
No flasshing, just up and quit on me. One unit did mysteriously come back for a short time but not for long. I'm going to try the inline fuse on the power supply to the blower motor, hopefully that'll fix it.
I have had my '91 since December nad have just gone through my 3rd heater control module. The second one actually quit and then started working for a while. Asny idea's on a cause and more importantly a fix.
I have 15's and original profile rubber, I want to maintain same height. Can anyone point me to a site that can help calculate a 16, 17, or 18 inch setup that maintains the same tire height.