Quoted from WOLF:
Hey, thanks for the help Xenon75 and Barakandl. You guys got me headed in the direction enough that I found it. It is the aux lamp driver. After 9 fuses and a lot of trial and error, and reading the book and schematics, and following your leads! Wish I could find a 4amp circuit breaker! Kudos to pinside.
Stumbled on this thread. Undoubtedly you no longer require this, but perhaps someone else will find it useful. I've soldered one of these onto the ends of a blown 3AG fuse and it does the trick. My toolbox has them at 1A, 5A, 10A, 20A. Not entirely cost effective in the short term, but certainly easier to troubleshoot with and a lot less frustrating and stressful when you're down to your last handful of fuses. https://www.digikey.ca/product-detail/en/te-connectivity-potter-brumfield-relays/W58-XB1A4A-4/PB196-ND/45084