If you do not have access to either of these manuals, you can also find wiring diagrams online by searching for "Massey Ferguson 165 Perkins Diesel wiring diagram."
Here are a few links to websites that may have the wiring diagram you are looking for:
* [Massey Ferguson 165 Perkins Diesel Wiring Diagram](https://www.tractordata.com/farm-tractors/004/2/4/4229-massey-ferguson-165.html)
* [Massey Ferguson 165 Perkins Diesel Service Manual](https://www.manualslib.com/manual/1355382/Massey-Ferguson-165-175.html)
* [Massey Ferguson 165 Perkins Diesel Owner's Manual](https://www.masseyferguson.com/global/en/products/tractors/series/tractors-perkins-series/index.html)
If you are still unable to find the wiring diagram you are looking for, you can also contact a Massey Ferguson dealer or a local farm equipment repair shop.
Hope this helps!