I've at least found which leads not to use...
I found the antenna arial lead and noticed decent gauge wire...aha, connect, plug in, pop goes the fuse. Checked connectivity etc, all fine. New fuse, zippityzap. BLAST!! Must be drawing too much power. Hmmm...
Change of plans, the sunroof motor...Aha now I've got you, connect, plug in and pop goes the fuse. DOUBLE BLAST!!
Sooo My dear Mercedes, you think I am beat...but NO! Feareth thou, there is still the rear wiper motor, AAHHAA!! ZAP!! BLAST THRICE!!!
Fear Not, I Shall Return to fight another day...Any Ideas? My test accessory is a mini air/tire pump rated at 7.5Amps Start and 5amp cont. running. All of the leads I tested are rated for 16 amps. Don't know why I would have popped those fuses?