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What You Need to Know About Wiring Your TND765 or HD100 to Your Truck

Rand McNally offers 2 EOBR solutions. The first is the TND765, which is a complete stand-a-lone EOBR, as well as a full featured TND730 Truck GPS. You get the best of both worlds. The 765 comes stock with a 9-pin Deutsch Connector, that plugs into the Truck's diagnostic port, located under the dash to the left side of the steering wheel. This cable will normally fit most 1998 to present Class 4-8 heavy-duty Trucks. Rand McNally offers optional cabling for those truck's that do not come with the 9-pin connector. See more on cabling below. The standard cable has both a male and female 9-pin connector for convenience. You plug the female into your Truck's 9-pin diagnostic port and use the male for any maintenance, that might be needed. The third connector is a Souriau 8-pin, that plugs into the back of the TND765.

The second is the HD100, which was designed for those Truckers who have already purchased a TND720 or TND730 GPS and only need to add the EOBR. The HD100 comes stock with a 9-pin Deutsch Connector, that plugs into the same diagnostic port, located under the dash to the left side of the steering wheel. This cable will normally fit most 1998 to present Class 4-8 heavy-duty Trucks. Rand McNally offers optional cabling for those truck's that do not come with the 9-pin connector. See more on cabling below. The standard cable has 1 female 9-pin connector, that plugs into your Truck's 9-pin diagnostic port. You would have to temporarily remove it for any maintenance. The third connector is a Molex 20-pin, that plugs into the HD100.


9-pin Deutsch Connector

Souriau 8-pin Connector

Molex 20-pin Connector






There are several optional Cables available at the Rand McNally website for those trucks that do not have the 9-pin Deutsch Connector. These cables are either for the TND765 or the HD100 and are not interchangeable.

6-Pin Adapter Covers 1995 to present Class 4-8 heavy-duty trucks.


TND760/TND765 Wiring Harnesses


TND760 Y-Cable

Compatible with TND760 device. Works for both J1708 and J1939-equipped vehicles with a 9-pin diagnostic port.

TND760 9-Pin to 6-pin Converter






Compatible with TND760 and HD 100 devices. This converter enables you to connect a 9-pin J1908 cable to your truck's 6-pin J1708 diagnostic port.

TND760 9-Pin Y-Cable w/ Screw Nut



Compatible with TND760 device. For Peterbilt and Kenworth trucks.

TND765 9-Pin Y-Cable


Compatible with TND765 device. Works for both J1708 and J1939-equipped vehicles with a 9-pin diagnostic port.

TND760 OBD-II Converter Kit

Compatible with TND760 device. This converter kit enables TND™ 760 to connect to the OBDII data bus in light duty vehicles and passenger cars.

TND760 Spider Cable (Volvo Trucks)




Compatible with TND760 device. For Volvo trucks.

TND760 J1708 6-Pin Y-Cable

Compatible with TND760 device. Works for J1708-equipped vehicles with a 6-pin diagnostic port.

TND760 Conxall to Flying Lead

Compatible with TND760 device. Works for both J1708 and J1939-equipped vehicles whose diagnostic ports are hard to reach or where a hard-wired installation method is preferred.




HD100 Wiring Harnesses


HD100 OBD-II Converter Kit



Compatible with the HD100 device. This converter kit enables HD 100 to connect to the OBDII data bus in light duty vehicles and passenger cars.

HD100 J1708/J1939 9-Pin Y-Cable

Compatible with HD100 device. Works for both J1708 and J1939-equipped vehicles with a 9-pin diagnostic port.

HD100 J1708 6-Pin Y-Cable

Compatible with HD100 device. Works for J1708-equipped vehicles with a 6-pin diagnostic port.