I was going to do a write up, but this is more of a "WTF am I doing wrong" write up. So I used blue LED's first, then tried blue bulbs and neither were bright enough. I tried to take a pic but it's not bright enough to show up on my crappy camera. So here's what I did and tell me what I'm doing wrong. 1st take out gauges. This the backside View attachment 476575 2nd take out lights. I removed the white plastic guard on the back because I didn't have needle nose plier to take the bulbs out. I had to use the gf's tweezers. View attachment 476577 View attachment 476579 Here's a pic #1 is the bulb housing that you take out with needle nose pliers or tweezers. #2 is the Blue bulb. Here is the size info from website "#74 (T5, T1-3/4) bulbs are 3/4" x 1/8" diameter " #3 is the Stock bulb #4 is the Blue LED. Size info "#74 bulbs replace the following bulbs:17 18 37 70 73 79 85 86 2721" View attachment 476581 website was autolumination.com Very good customer service and product. I just don't think this works for my particular year or something. Are the older stangs 96-98 different gauges. The old thread about changing LED's in the guages has pics that look good but it's all older stangs. I even took the stock gauge face off to see if I could take it apart so it would let the light through better, but it's all one piece. I don't understand why it doesn't work. With the LED's and blue bulbs there is light shining from out the sides and back but it doesn't come through the gauge face.