Geotab HRN-EE06K3 Harness

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What Is the HRN-EE06K3?

The HRN-EE06K3 is Geotab's Mercedes power harness kit: a 100 cm (39.4 in) harness that supplies battery, ignition and ground to a GO device in Mercedes truck installs, giving a plug-in three-wire connection instead of splicing into the truck's wiring. Geotab's professional installation guide for this harness is written for the Mercedes-Benz eActros, manufacturer code MP6, from 2023 to the present, in left-hand-drive form.

Geotab's harness listing adds two details worth knowing before the install day. The ignition line carries an inline 20 kΩ resistor, and the harness uses Micro-Fit disconnect connectors. The same listing says the part is designed to work with the IOX-CLAMP for data retrieval, which tells you something important: this is a power harness, and engine data is gathered separately.

Which Vehicles and Devices Does the HRN-EE06K3 Work With?

Geotab's install guide for this part names one vehicle: the Mercedes-Benz eActros MP6 (Gen. 5), produced from 2023 onward, left-hand drive. The kit plugs into connector X15 in the fuse panel, which sits at the bottom of the dash in the passenger footwell behind a plastic cover marked "OBD". A T-harness is included for trucks where X15 already has something plugged into it.

The guide pairs the HRN-EE06K3 with a GO9, an IOX-UREADER with CAN clamp and status LED, an SPR-INSTALLBAG for mounting, and an IOX-Null harness to link the UREADER to the GO device. The power pinout in that guide is red for live on pin 6, yellow for ignition on pin 2, and black for ground on pin 1. Geotab lists no superseded part and no maximum connected cable length, and shows Taiwan as the country of origin.

What Problem Does It Solve on the Job?

Geotab's eActros install does not run through a standard diagnostic port T-harness. Power has to come from somewhere else, and the HRN-EE06K3 takes it from a factory plug at X15, so nothing is spliced into an expensive truck's wiring.

That suits fleets that want every eActros fitted the same repeatable way. The T-branch also covers the case where X15 is already taken by another fitment.

How Is the HRN-EE06K3 Installed?

Geotab classes this as a professional installation that calls for Certified Geotab Installer status or equivalent knowledge. Our technicians follow Geotab's eActros guide, which runs roughly in this order:

1. Open the "OBD" cover in the passenger footwell, remove the kick panel, the centre cover strip and the three T20 screws holding the lower dash panel.
2. Prepare the HRN-EE06K3 and connect its Molex connector with the yellow wire.
3. Route the wiring as the guide directs, checking every power source with a multimeter before connecting.
4. Plug into X15, or move the existing X15 connector to the other end of the T-harness if it is occupied.
5. Join the IOX-Null harness to the IOX-UREADER and the GO device, then fit the UREADER CAN clamp on the blue and green twisted pair at gray connector Z3X1.
6. Mount the GO9 with its underside, the GPS antenna side, facing away from metal, using SPR-INSTALLBAG tape pressed for at least 30 seconds, and keep 20 cm between the device and the driver.
7. Cable-tie loose wiring and connections, power up, wait for solid LEDs and the ten-beep signal, then verify in MyInstall and enter the vehicle details.

Geotab's general harness limits still stand: never more than 2 m (6.5 ft) of harness in total, never one T-harness into another, and the device always secured with cable ties.

Which Related Harnesses Should You Compare?

• HRN-CW03K3: Geotab's general three-wire kit with fuse kit, listed for Mercedes and Volvo Euro 3 and Euro 4 trucks where a loose-wire power install is needed.
• SPR-INSTALLBAG: the bracket, tape and fixings bag Geotab's eActros guide uses to mount the GO9.
• HRN-CP04K2: a different Mercedes kit, for the PSM module on the Sprinter 907 chassis rather than a heavy truck.

What Are Common Questions About the HRN-EE06K3?

Which truck is the HRN-EE06K3 used on?

Geotab's professional installation guide for this harness covers the Mercedes-Benz eActros, manufacturer code MP6, built from 2023 onward in left-hand-drive form.

Does the HRN-EE06K3 need an inline fuse?

Geotab's eActros guide says no separate inline fuse is required because the harness takes power from a location the truck already fuses. The circuits are still checked with a multimeter first.

How does the GO device get engine data on an eActros?

The power harness only supplies power, ignition and ground. In Geotab's eActros guide, CAN data comes through the IOX-UREADER's CAN clamp fitted at connector Z3X1, and Geotab's harness listing says the harness is designed to work with IOX-CLAMP.

API Signal supplies and installs Geotab harnesses, IOX modules and GO devices at the customer's yard, including specialist heavy truck fitments like this one. Call 803-513-1009 or use Get a Quote to schedule your eActros installs.

Sources: Geotab Harness Identification and Application (HRN-EE06K3 entry); Geotab Mercedes-Benz eActros e600 (LHD) 2023 to present Professional Installation Guide, HRN-EE06K3; Geotab Harness Assessment Cheat Sheet. GEOTAB is a registered trademark of Geotab Inc. API Signal is an independent installer and is not Geotab.