Geotab HRN-RL12K2 Harness

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What Is the HRN-RL12K2?

The HRN-RL12K2 is a 12-pin harness kit built to connect a Geotab GO RUGGED to off-road vehicles that run a Deutz engine. It ships as a base harness plus a fuse kit, measures 30 cm (11.8 in), and collects J1939 engine data where the engine provides it.

This is one of the few Geotab rugged harnesses chosen by engine rather than by machine brand. Deutz builds diesel engines that a range of equipment manufacturers install in their own machines, so the badge on the hood is not a reliable guide. A telehandler, a compact loader, a compressor or an aerial lift from different builders might all carry a Deutz engine. The deciding question is what the engine plate says, which is why we look under the hood before ordering this part.

Which Vehicles and Devices Does the HRN-RL12K2 Work With?

Geotab lists the harness for off-road vehicles with a Deutz engine, used with the GO RUGGED device. That narrows it to equipment rather than highway trucks. Geotab does not attach a year range or a list of machine models, and the kit is not described as replacing an earlier part.

It is worth separating this kit from the other 12-pin rugged parts. The HRN-RC12T2 is a 12-pin Komatsu harness limited to Tier 4 engines, and the HRN-RS12S2 converts an OBD-II port to the GO RUGGED's 12-pin connector. Same pin count, three very different jobs. The RL12K2 is the one for Deutz power. Its 30 cm harness leaves most of the 2 m connected cable allowance available for positioning, though the device location still needs planning on tightly packaged machines.

What Problem Does It Solve on the Job?

Rental yards and equipment fleets often hold machines from several builders that share an engine supplier. Without an engine-specific harness, those machines tend to get a basic power install that tracks location and estimates activity from voltage and movement. That works, but it leaves the engine's own information unused.

With the RL12K2, the GO RUGGED can read J1939 engine data from a Deutz engine where it is broadcast. For a rental business, that means run hours that come from the engine rather than an estimate, which helps settle billing and schedule service. For an owner-operator, it can flag a machine that idles for hours on site, or catch a fault before it turns into a breakdown on a deadline job.

How Is the HRN-RL12K2 Installed?

Geotab does not list separate instructions for this kit, so we follow the GO RUGGED installation guide and the general Geotab harness rules:

1. Read the engine data plate to confirm a Deutz engine, and record the device serial, the machine serial and its hour meter. Register the device serial first.
2. Shut the machine off, let the engine compartment cool if you are working near it, and leave the GO RUGGED disconnected.
3. Locate the 12-pin connection and confirm the pin count before going further.
4. Connect the base harness, then use the supplied fuse kit as the Geotab kit requires, with sealed, heat-shrunk connections.
5. Plug the GO RUGGED in and check that its gray weatherproof connectors are fully seated.
6. Keep the total cable within 2 m (6.5 ft) and never link two T-harnesses together.
7. Mount the device on a solid part of the machine with an open view of the sky, away from exhaust heat, and secure it and the harness joints with cable ties.
8. Run the engine, check the ignition, GPS and cellular LEDs, and finish in MyInstall with a Pass result.

Which Related Harnesses Should You Compare?

• HRN-RC12T2: the 12-pin Komatsu harness, limited to Tier 4 engines.
• HRN-RS12S2: the weatherproof OBD-II to 12-pin harness for machines with a standard 16-pin port.
• HRN-RZ04T4: another engine-based choice, for Kubota gas and diesel engines.
• HRN-RW07T1: the tri-pin CAN harness when no diagnostic connector is present.

What Are Common Questions About the HRN-RL12K2?

Does the HRN-RL12K2 depend on the machine brand or the engine brand?

The engine brand. Geotab lists it for off-road vehicles with a Deutz engine, so the engine label decides the fit rather than the name on the machine.

What is in the HRN-RL12K2 kit?

Geotab lists a base harness and a fuse kit. The harness is 30 cm (11.8 in) long.

Is the HRN-RL12K2 meant for on-road trucks?

No. Geotab lists it for off-road vehicles with Deutz engines, so it is aimed at equipment rather than highway vehicles.

Our technicians bring the Geotab GO RUGGED and the Deutz kit to your equipment and install it where the machines are parked. Reach API Signal on 803-513-1009, or ask for a price through Get a Quote.

Sources: Geotab harness identification list, Deutz kit, GO9 RUGGED documentation from Geotab, Geotab Installations GO9 RUGGED steps, Geotab telematics harness guide. GEOTAB is a registered trademark of Geotab Inc. API Signal is an independent installer and is not Geotab.