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There are four main wiring harnesses in a Datsun 1200.

1 Overview
2 Engine Room Harness
- 2.1 Grommet
- 2.2 Engine Sub-Harness
3 Instrument Harness
4 Body Harness
5 Branch Cables

Overview

The four main harnesses:

24012 Engine Room Harness (includes front light wires)
24013 Instrument Harness (dashboard)
24014 Body Harness: goes from firewall to rear of car, under floor mat
24015 Tail Harness (rear lights)

Engine Room Harness

Many, many different cables. See Wiring Part Numbers. Newer ones are two-piece using a "sub-harness".

Grommet

The engine room harness comes into the cabin a few inches. There is a grommet at the firewall.

24545A GROMMET
24250-89927 TO 8012
06510-00093 8101-8503
01551-00093 8504-8910

06510-00093

Engine Sub-Harness

On newer 1200s, ENGINE ROOM SUB-HARNESS ASSY is the branch that goes down to the transmission

post

A small harness that connects to the starter motor, reverse light switch, etc. Connects to Engine Room Harness (engine compartment) via a circular pin connector.

Instrument Harness

The dash harness is the same Part Number for Coupe or Sedan. However, rectangle dash differs from round dash (Coupe is always round dash. Sedan may be either). It also varies by year.

Export

24013-G1270 1980 Australia (reported)

Japan

1970-1971

GL and GX have round-gauge dash. All Coupes including DX Coupe have round gauge dash. STD and DX sedan have rectangle-gauge dash.

Deluxe rectangle gauge dash

Deluxe Coupe

After the April 1971 rationalization, only three harnesses were used:

* STD/DX    [rectangle gauge]
* GL/GX     [round gauge]
* Automatic [round gauge, with kickdown switch plug]

Before April 1971 many harnesses were used: (3,4 or Auto) and (DX/STD vs GL/GX) and "cold option" versions of every one of those.

Cold option may have wiring for heater?
STD/DX is square gauge, GL/GX is round gauge

3-speed and Van Super-Deluxe T=4-speed (VDT)
*　24013-H1206 COMP.-CABLE, instrument harness (from '71-Apr.) 3-speed, VDT
** replaced 24013-H1002 COMP.-CABLE, instrument harness 3-speed, VDT
** replaced 24013-H1022 COMP.-CABLE, instrument harness (寒冷地向) (op.) 3-speed, VDT

4-speed
* 24013-H2206 COMP.-CABLE, instrument harness (from '71-Apr.) 2GL, 4GL, GX
* 24013-H2020 COMP.-CABLE, instrument harness GX
** replaced 4013-H1200 COMP.-CABLE, instrument harness 4-speed (exc. VDT, GL, GX)
** replaced 4013-H1220 COMP.-CABLE, instrument harness (寒冷地向) (op.) 4-speed (exc. VDT, GL, GX)
** replaced 24013-H2000 COMP.-CABLE, instrument harness 2GT, 4GT, CG
** replaced 24013-H2020 COMP.-CABLE, instrument harness (寒冷地向) (op.) 2GT, 4GT, CG

Automatic
* 24013-H1216 COMP.-CABLE, instrument harness (from '71-Apr.) 2DA, 4DA
** replaced 24013-H1105 COMP.-CABLE, instrument harness 2DA, 4DA
** replaced 24013-H1125 COMP.-CABLE, instrument harness (寒冷地向) (op.) 2DA, 4DA
* 24013-H2016 COMP.-CABLE, instrument harness (from '71-Apr.) 2GA, 4GA, CGA
** 24013-H2005 COMP.-CABLE, instrument harness 2GA, 4GA, CGA
** 24013-H2025 COMP.-CABLE, instrument harness (寒冷地向) (op.) 2GA, 4GA, CGA
** 24013-H1305 COMP.-CABLE, instrument harness CA
** 24013-H1325 COMP.-CABLE, instrument harness (寒冷地向) (op.) CA

1972

1972 moved to all-round gauge, even for STD

Even Van had round gauge for 1972

Truck

HARNESS ASSY-INSTRUMENT/Instrument Harness Cable 24013
24013-H1002 (up to '73-3)
24013-H1022 (up to '71-3) (op.)
24013-H1206 (up to '71-4)
24013-G1000 
24013-G1602 -7803
24013-G1661 7804-8109
24013-G1900 8110-8608
24013-G1901 8608-8910
24013-95W00 8910-

USA

LHD with round-gauge dash.

photo

24013-H1905 HARNESS-INSTRUMENT MANUAL
24013-H2118 HARNESS-INSTRUMENT 0471-
24013-H2118 HARNESS-INSTRUMENT AUTOMATIC 0471-0671
24013-H2112 HARNESS-INSTRUMENT AUTOMATIC 0771-0672
24013-H7000 HARNESS-INSTRUMENT AUTOMATIC 0772-

Body Harness

The Body Harness goes from the firewall, under the floor mats to the rear of the car.