17. Engine Harness (New Production)

DeLorean Industries new production wiring harnesses. Manufactured in house at our facility in Akron, Ohio. Updates any car to late 83 style tucked harness. Optional power distribution wires recommended for complete installation. 

The factory had two primary harness designs during production. The major revision to the main engine wiring harness occurred later in production. This is regarded as the superior design due to not only fitment and routing but for removing the primary alternator harness output circuit from a convoluted path through the entire harness. Manufactured to OEM modern day specifications, the harness removes a number of failure prone connection points. As with many things produced, we opted to manufacture in house to control quality above and beyond any standard we could hold with an outside manufacture. 

ENGINE MAIN HARNESS UPDATED (LATE PRODUCTION SPEC)

PART# 370110185

Congratulations on purchasing a DeLorean Industries Engine Main Harness. This updated harness is designed to replace the obsolete early-style production harness, update connector reliability whenever possible, and solve the no longer available failure-prone “late 83” production harnesses.

OVERVIEW

All connection points, ranging from the single-pin connectors to the Lucas-style church tree connector, have been updated or manufactured for superior reliability above and beyond what the factory components offered. Below listed is a breakdown of all the termination points for process reference.

Church Tree Lucas Connection Points

The updated harness Utilizes the same factory plug-in points on the firewall. Using the supplied diagram, this is the upper right corner blue nine connector terminals 19-27, lower left seven-pin connector terminals 28-34, and lower right nine-pin connector terminals 44-52. To tell the difference between the two nine-pin connectors, reference the top left pin on the wire side. The connector for the blue bulkhead point has an orange wire. The connector for the white bulkhead point has a green wire. Both top pins are empty.

Frequency Valve (Passenger valve cover) – Retains a Bosch 2-pin EV1 connector updated to modern weather pack sealing technology.

Warm Up Regulator CPR (Driver side valve cover) – Retains a Bosch 2-pin EV1 connector updated to modern weather pack sealing technology. 

Cold Start Valve (Top of the brass tube next to intake driver side) – Retains a Bosch 2-pin EV1 connector updated to modern weather pack sealing technology. 

Idle Speed Motor (Directly in front of cold start valve) – Retains a Bosch 3-pin EV1 connector updated to modern weather pack sealing technology. 

Idle Speed Thermistor (Beneath intake manifold in Y pipe) – Retains a Bosch 2-pin EV1 connector updated to modern weather pack sealing technology. 

Thermal-Time Switch (Side of the water pump) -Retains factory-style Bosch D Jetronic direction-sensitive connector.

Ignition Vacuum Solenoid (Rear of air metering housing) -Retains factory-style Bosch D Jetronic direction-sensitive connector.

Lambda Sensor Switch (Spade terminal switch on Y pipe) – Utilizes an updated water-tight spade connector.

Oxygen Sensor Ground (Passenger side intake manifold front) – Updated to a weather pack water-tight quick disconnect connection instead of a factory unsealed spade connector. This Still utilizes a ring terminal at the manifold bolt-on point.

A/C Compressor Positive Lead (Connects to the compressor) – Updated to a weather pack water-tight quick disconnect connection.

Oil Pressure Warning Light (Driver side block behind the converter)- Factory style flag spade connector.

Oil Pressure sensor (passenger side block below alternator) – Factory style flag spade connector.

Idle Speed Microswitch (Adjacent to throttle body) - Factory-style flag spade connectors.

Full Throttle Microswitch (Under W pipe on throttle spool) – Updated to a 4-pin weather pack water-tight quick disconnect connection. The connector orientation mimics the stock harness. Terminate with the supplied connector to copy this.

Starter S Terminal (At starter motor) – Updated to single ring terminal for updated late model high torque starter units.

Coolant Temperature Sensor (Passenger front of cylinder head) – Factory Style ring terminal.

Alternator (Passenger side top accessory position) – Updated to a water pack water-tight quick disconnect in line with the alternator plug.

OPTIONAL POWER DISTRIBUTION KIT ITEMS (REQUIRED FOR COMPLETE UPDATED)

The alternator cross-over harness present on early to mid-production cars (three large gauge wires in the entire length of the harness) is deleted in favor of running the late-style jumper from the coil compartment to the jump-start post. This is installed at the primary power stud junction in the bottom corner beneath the bulkhead connectors. This terminates to the jump start lead junction in front of the coolant bottle. The reference part number is 370110093.

The alternator to starter connection is updated to the late-style production utilizing this harness. The reference part number is 370000789. This is routed from the starter terminal battery cable point, down below and around between the oil filter and oil pressure sender, and terminated at the back of the alternator lead terminal. Take care to route this away from the exhaust, depending on what system is installed. The above method works for stock exhausts and specification one DeLorean Industries systems.

The shorter of the two is for the bulkhead to jump post point. The longer of the two goes from the alternator power lead to the starter top terminal.