I took it out a while back when my cruise quit working and couldn't see anything wrong with it at the time and just set it aside.... until now. I finally looked it over really close and peeled the pad on the back of it off to find what appers to be a burned out "thingy", the soldering looks a little burned where it goes in or at least different than all the other places. The problem is I don't know what the "thingy" is or where to get a new one. If I can find out what it is Radio Shack might be able to get me one. It's a small green box looking thing (there are several but this is the smallest one). One the top it has "JK 100DC" and on the side there is "ERO" inside a square and then "MKT 1818" under that. Anyone have any idea what this thing is or where to get one? I would rather not spend $185 to get a new amp.

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1985 300D Turbo ~225k
2000 F350 (Powerstroke) 4X4, SWB, CC, SRW, 6spd ~148k
1999 International 4900, DT466e (250hp/660 ft/lbs), Allison MD3060 ~73k