M20C electrics

[pilot-as14]

Hi,

there are certainly many here who are well acquainted with the electrical system. I only have the schematic from 1966. I don't understand a couple of things. There's a box with the thick cable, I assume it's a noise filter. But it's not on the schematic. How is it supposed to be wired?

Edited February 12, 2023 by pilot-as14

[Fly Boomer]

2 hours ago, pilot-as14 said:

Hi,

there are certainly many here who are well acquainted with the electrical system. I only have the schematic from 1966. I don't understand a couple of things. There's a box with the thick cable, I assume it's a noise filter. But it's not on the schematic. How is it supposed to be wired?

Are we looking at the back (engine) side of your instrument panel?  Looks like a hole near the bottom for a 3-inch instrument?

[pilot-as14]

no, the box sits on the fireshot in the engine bay. 

[Guest]

That is the alternator nois filter.  The yellowish cable goes to the alternator output stud, the cable from the airframe goes on the stud on the noise filter.

Here’s what you need

[pilot-as14]

Many thanks! There is no such drawing in my books. Now I understand that. My manual is very old, 1966. Can you get newer books on an internet site?

I haven't found it yet.

[cliffy]

Check the TCDS and look for your year and model in the listing for Owner's manuals   Model C pasted below

401. .......FAA Approved Airplane Flight Manual (a) Flight Manual, dated October 20, 1961, required for S/N 1852, 1940 through 2622. (b) Flight Manual dated August 21, 1970, for S/N 700005 and on. M20C S/N 20-0001 thru 20-0009. (c) Flight Manual dated January 1974, for S/N 20-0010 through 20-1146. See Note 2. (d) Flight Manual dated December 1974, for S/N 20-1147 through 20-1172. See Note 2. (e) Flight Manual dated August 1975, for S/N 20-1173 through 20-1185. See Note 2. (f) Flight Manual dated October 1975, for S/N 20-1186 through 20-1218. See Note 2. Superseded by (g). (g) Pilot’s Operating Handbook dated October 15, 1977, for S/N 20-1240 and on (replaces (f) for S/N 20-1186 and

That will tell you which one you need to carry

Most if not all of them are on this site in downloads IIRC.