Begin by testing the fuses in the fuse box with a test light not a meter .

If you look at them and says 'they all look fine to me' stop, you're never going to fix it unless you do the actual work those crazy Mechanics want $50 / hour to do .

IMO, I'd automatically replace any silver or gray colored strip fuses because they're essentially worthless due to age .

It takes time to find the correct copper strip fuses but they're out there .

You shouldn't need a wiring diagram .

Yes, I have the factory diagrams but they're HUGE and are circuit diagrams, not overly helpful in figuring out what's what on the actual car .

I have no idea how to scan these and will soon be selling off or throwing out my large collection of factory shop manuals, I only need a few to cover my later production cars .

No one wants to buy them any where at any price and no, I'm not going to give then away for $20 each when I paid hundreds after searching for years to get them .

If there's any technical book store in the L.A. basin area , tell me and I'll sell them as one big lot along with many other brands manuals part & service, owner's booklets etc. but NO DIRECT SALES .

__________________
-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better