Geotab HRN-DC14T1 Harness

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What Is the HRN-DC14T1?

The HRN-DC14T1 is a 14-pin T-harness that links a Geotab GO RUGGED telematics device to Caterpillar machines from the 2016 model year forward. Geotab rates it IP67 when it is used with the GO RUGGED, and the harness is 27 cm (10.6 in) long.

Caterpillar equipment has its own way of presenting diagnostic data. Geotab's own harness guide points out that CAT engines can use different pinouts, connectors and engine data from the generic heavy-duty layouts found in on-road trucks. That is why a universal 9-pin harness is not always the right answer on yellow iron, and why Geotab offers CAT-specific parts. The DC14T1 covers the 14-pin connection on the newer machines, giving the device a direct path to the equipment's data.

Which Vehicles and Devices Does the HRN-DC14T1 Work With?

Geotab lists the harness for CAT vehicles from 2016 onward, used with the GO RUGGED. That covers the kind of late-model fleet a contractor or rental house typically runs: excavators, wheel loaders, dozers, backhoes and similar machines that carry a 14-pin diagnostic connection. The model year is the main filter Geotab gives, so the connector itself should be confirmed on the machine before the order is placed.

Geotab does not list a part that the DC14T1 replaces, and no separate base harness is required. The 27 cm length leaves most of the 2 m maximum cable allowance available if the device needs to sit a little further from the connector. Geotab also lists a second CAT route, the HRN-RMRCA1 adapter, which works only in combination with the HRN-GR09K1 universal rugged 9-pin T-harness.

What Problem Does It Solve on the Job?

On a dirt job, machines rotate between sites, operators and sometimes owners. A project manager wants to know which excavator is burning fuel at idle, which dozer is close to its service interval and which loader has sat unused for a week. Those answers come from engine data, not just GPS. A three-wire install would show location and an ignition-based hour count, but it would miss the richer data that the machine's own connector can supply.

The harness also suits the environment. CAT cabs get muddy, open-station machines take rain, and wash-down after a job is routine. An IP67 rating at the connector, matched to a device rated IP68 and IP69K, means the electrical joint is not the weak point in the install.

How Is the HRN-DC14T1 Installed?

Geotab does not publish separate instructions for this part on its harness list, so our technicians apply the GO RUGGED installation rules:

1. Record the GO RUGGED serial, the machine's serial or fleet number and its current hour meter, and add the device to the database first.
2. Park the machine on level ground, shut it down and keep the device unplugged during harness work.
3. Find the 14-pin diagnostic connector in the cab, unplug it and connect the T-harness in line so the machine side and the pass-through side are both made up.
4. Plug the device lead into the GO RUGGED and check that every gray weatherproof connector is fully seated, since that seal is what carries the rating.
5. Keep the total harness at or under 2 m (6.5 ft) and never connect a second T-harness into this one.
6. Mount the device on a solid surface with a clear view of the sky, then secure the harness and device with cable ties on both sides of every connection.
7. Start the engine, wait for the ignition, GPS and cellular LEDs to go solid, and confirm Pass in MyInstall.

Which Related Harnesses Should You Compare?

• HRN-RMRCA1: a CAT adapter for the GO RUGGED that works together with the HRN-GR09K1 rather than on its own.
• HRN-GR09K1: the universal IP67 rugged 9-pin T-harness kit with four mounting adapters.
• HRN-RW07T1: the tri-pin CAN harness for off-road machines with no diagnostic port.
• HRN-RC12T2: the Komatsu equivalent, a 12-pin harness for Tier 4 machines.

What Are Common Questions About the HRN-DC14T1?

Does the HRN-DC14T1 fit CAT machines older than 2016?

Geotab lists this harness for CAT vehicles from 2016 onward. For an older machine, we identify the connector on site before choosing a part rather than assuming this one fits.

Is the HRN-DC14T1 waterproof?

Geotab rates it IP67 when it is paired with the GO RUGGED device, which suits open-cab and wash-down conditions.

Can a CAT service tool still connect after this harness is fitted?

It is a T-harness, so it is designed to sit in line at the connector rather than take it over completely. We confirm access to the diagnostic connection before closing up the panel.

API Signal brings the Geotab device and the correct CAT harness to the job site or equipment yard and installs them on the machine. Talk to us at 803-513-1009 or start with Get a Quote.

Sources: Geotab harness identification document (GO RUGGED section), Geotab blog on CAT pinouts and harness length, GO9 RUGGED product document, GO9 RUGGED install guide. GEOTAB is a registered trademark of Geotab Inc. API Signal is an independent installer and is not Geotab.