Cluster wiring diagram needed?

Sure, here are the instrument cluster pinouts and wiring diagrams for clarity, this guide can help you with the testing.

https://www.2carpros.com/articles/how-to-check-wiring

1- Outside air temperature sensor -G17-, Ground (GND) 1)
2- Engine Coolant Level (ECL) sensor -G32-
3- Terminal 31, Ground (GND)
4- Multi-function indicator memory switch -E109- (reset) 1)
5- Terminal 31, Ground (GND)
6- Multi-function indicator memory switch -E109- (memory) 1)
7- Vehicle Speed Sensor (VSS) output
8- Oil pressure switch -F1-, 1.8 bar
9- 0.3 bar oil pressure switch -F22-
10- Terminal 1/terminal W
11- Terminal 30, battery positive voltage (B+)
12- Terminal 58b, lighting
13- Terminal 15 (B+ with ignition switched on)
14- Open
15- Multi-function indicator mode select switch -E86-1
16- Generator (GEN) warning light -K2-, terminal 61
17- Engine oil temperature sensor -G8- 1)
18- Brake and parking brake warning light -K7-
19- Outside air temperature sensor -G17-, signal 1)
20- Malfunction Indicator Lamp (MIL) -K83-, or glow plug indicator light -K29- (Diesel)
21- Fuel gauge -G1-
22- Left turn signal indicator light -K65-
23- Engine Coolant Temperature (ECT) gauge -G3-
24- Right turn signal indicator light -K94-
25- Headlight high beam indicator light -K1-
26- Input signal, fuel consumption 1)
27- Vehicle speed signal from speedometer Vehicle Speed Sensor (VSS) -G22-
28- Transmission Range (TR) selector lever display (AG4)

1) Only with multi-function indicator -J119-

Check out the images (below). Let us know if you need anything else.

Sure, there are two power pins one is switched while the other is constant battery.

3- Terminal 31, Ground (GND)

11- Terminal 30, battery positive voltage (B+)
13- Terminal 15 (B+ with ignition switched on)

7- Vehicle Speed Sensor (VSS) output

26- Input signal, fuel consumption 1) TACH

Let us know if you need anything else.

I would try either one to see if whatever you are doing will work.

So, it is working correctly? All good?

Nice work, thanks for letting us know, we are here to help, please use 2CarPros anytime.