Thanks for the quick reply mscguy.
My mistake on H3/9, I wasn't aware of the Ignition 2 wire, I've now updated with my intended wiring including car side.
H1 Main Harness 6 pin connector
1. Red (+)12v Constant input - 12v 30a Fused constant battery live - Spliced into White at ignition harness
2. Black (-) Chassis ground - Ground - Chassis ground
3. Brown (+) Siren output - Live to siren
4. WHITE/ brown Parking light isolate - Not needed
5. White Parking light output - (+)12v output to headlight for visual arm/disarm - RED / yellow at steering column harness
6. Orange (-)500mA ground when armed - Not using
H2 Auxiliary harness 24 pin
1. Pink/white (-)200mA Igntition 2/Flex output - Not using
2. Blue/white (-)200mA 2nd status/rear defogger output - Negative switch output for rear screen defogger (relay control)
3. RED / white (-)Trunk release output - Negative switch output for boot release solenoid (relay control)
4. BLACK / YELLOW (-)Dome light output - Negative switch output for interior light (relay control)
5. Dark blue (-)200mA Status output - Not using
6. WHITE/ black (-)200mA Aux 3 output - Not using at present
7. WHITE/ violet (-)200mA Aux 1 output - Not using at present
8. ORANGE / black (-)200mA Aux 4 output - Not using at present
9. Gray (-)Hood pin input - As described
10. Blue (-)Trunk pin input - Not needed as trunk pin is wired to door courtesy light circuit
11. WHITE/ blue (-)Activation input - When grounded initiates remote start, not using at present
12. Violet/white Tachometer input - Tacho signal input from ignition
13. BLACK/ white (-)Neutral safety/Parking brake input - Wire to handbrake switch (grounded when applied)
14. GREEN/ black (-)200mA Factory alarm disarm output - Not needed
15. Green (-)Door input - RED / white drivers kick panel
16. BROWN / black (-)Horn honk output - Not using
17. Pink (-)200mA Ignition 1 output - Grounds when ignition key is in ignition 1 position if required, not using
18. Violet (+)Door input - Not needed
19. Violet/black (-)200mA Aux 2 output - Not using at present
20. Brown (+)Brake shutdown input - GREEN / WHITE at brake pedal switch
21. Violet / YELLOW (-)200mA Starter output - Grounds during starter operation if required, not using
22. Gray/black (-)Diesel wait to start input - Not needed
23. Orange (-)200mA Accessory output - Grounds when ignition is in the accessory position, not using
24. GREEN / WHITE (-)200mA Factory alarm disarm output - Not needed
H3 Remote start 10 pin heavy gauge harness
1. NC - No connection
2. RED / black (+)Fused 12v Accessory/Starter input - 30a Fused constant live - White at ignition harness
3. Pink/black (+)Flex relay input (87a) key side (if required) of flex relay - 25a Fused constant live - White at ignition harness
4. Pink/white (+)Ignition 2/Flex relay output - BLACK/ orange at ignition harness
5. Red (+)Fused ignition 1 input - 12v 30a Fused constant battery (+) - White at ignition harness
6. Green (+)Starter input (key side of starter kill) - BLACK/ white at ignition harness, cut and wire to key side
7. Violet (+)Starter output (starter side of starter kill) - BLACK/ white at ignition harness, cut and wire to starter side
8. Orange (+)Accessory output - Splice into Gray at ignition harness
9. RED / white (+)Fused 12v ignition 2/flex relay input - 30a Fused constant live - white at ignition harness
10. Pink (+)Ignition 1 input/output - Splice into ignition 1 - Blue/red at ignition barrel
I'm also planning to use the included 504D shock sensor and 508D proximity sensor, these came with their own 4 wire harnesses. Am I right in assuming they simply plug into sensor 1 and sensor 2 inputs on the side of the main unit, although I have come across some weird diagrams for those as well.
Thanks again for any help, sorry if some of this sounds a bit basic.