<a data-id="1044" data-value="EishiFUN" data-denotation-char="@" href="/user/eishifun" class="text-decoration-none mention">@EishiFUN</a> Your comment was very helpful; thank you.

Type of harness used to install GO9 in Mercedes Benz Sprinter 2026 units

Hello. If it is possible to connect the GO device in the bus, I recommend using the following harness: HRN-CW03K3 3-wire harness for GO devices – PWR, GND, IGN.

need to install geotab gps on older bus

Can a GO9 work in a FRUEHAUF dry van with a 3-wire harness, and what would the considerations be if it is feasible?

Hey everyone, Wanted to share some useful info that came up recently around Geotab GO device installations — specifically around antenna orientation and how it affects GPS performance. This information doesn't seem to be commonly known and is CRITICAL for anyone that deals with GO Device Hardware. The Antenna Is Directional and is located on the UNDERSIDE/BOTTOM of the device!Contrary to what you might assume, the internal GPS antenna in Geotab GO devices is directional — not omnidirectional like your phone's antenna. It's physically located on the underside of the device, beneath the printed label/logo.When the device is plugged directly into the OBD-II port under the steering column, the antenna faces downward toward the floor. However, this still works because GPS signals bounce off the asphalt and the vehicle's metallic chassis floor, acting as a reflector. So, although it may not be ideal, it is functional by design for standard plug-in installs. Remember, the designing engineers have to create a product that is as forgiving as possible- the end result is a compromise and results in hardware that is functional in the broadest array of installations/applications. Hidden/Harness Installs? Flip It UpwardIf you're using a T-harness or extension cable to tuck the device inside the dash, the rules change. Geotab's own GO9 support guidelines say you should orient the device with the label/antenna side facing up toward the sky whenever possible. Direct line-of-sight to the satellites overhead gives you: Faster GPS latch times on startupLower Position Dilution of Precision (PDOP)More accurate, consistent tracking data Getting this wrong (antenna pressed against metal, or facing the wrong way in a hidden install) can result in "straight-lining" on your fleet maps — where the system can't get a valid lock and just draws a straight line between the last two known good coordinates. How Glass Affects the SignalThe impacts of vehicle glass is often forgotten or overlooked, but nonetheless critical to performance and stability. Here's a quick breakdown: Glass Type / GPS Impact Standard clear glass / ✅ No impact — GPS passes right throughNon-metallic aftermarket tint (dyed/carbon) / ✅ No impact — signal-safeMetallic/hybrid tint / ❌ Significant degradation — metal particles create a Faraday shielding effectCeramic tint / ✅ No impact — heat-rejecting but signal-friendlyFactory solar/athermic windshields / ❌ Significant degradation — thin metal oxide layer blocks signal If your vehicles have factory "acoustic" or solar-reflective glass (very common in newer model years), be aware that tucking the device under the dash and relying on windshield pass-through may cause issues. Pro tip: Look for the dot matrix zone — the black speckled band typically found near the rearview mirror mount. Manufacturers intentionally leave this area free of metal oxide so that devices like toll passes and telematics units can receive signals through the glass. This is often the best spot to aim for signal penetration. Hope this helps someone avoid a head-scratcher during their next install!Thanks!!!  (Mods: feel free to move if there is a better place for this info to reside)

FYI: Geotab GO Device Antenna Orientation & Signal Quality — IMPORTANT INFO You Need to Know!

Hello,I'm looking for clarification on the recommended power/install method for the GO Focus Pro when it is being used alongside a GO9 device.From the documentation, the power consumption between the GO Focus Plus and GO Focus Pro appears to be very close, within only a few milliamps in most modes.GO Focus PlusNominal: 6 W 0.5 A at 12 V / 0.25 A at 24 VParking Mode: &lt;0.4 W 30 mA at 12 V / 18 mA at 24 VDeep Sleep Mode: &lt;0.1 W 7 mA at 12 V / 4 mA at 24 V GO Focus ProNominal: 6 W 0.5 A at 12 V / 0.25 A at 24 VParking Mode: 600 mW 50 mA at 12 V / 2.5 mA at 24 VDeep Sleep Mode: 98 mW 8 mA at 12 V / 4 mA at 24 V My question is: Why can't the GO9 be used to power the GO Focus Pro, especially when the documented power draw is so similar?Also, since the GO Focus Pro has an available OBD-II power harness, HRN-IOXGFPRO-OBD, could an OBD splitter be used so that the GO9 remains plugged into the vehicle's OBD port while the GO Focus Pro receives power from the same OBD connection?In other words, would this setup be acceptable?Vehicle OBD port → OBD splitter → GO9 + GO Focus Pro OBD power harnessOr is hardwiring the GO Focus Pro directly into the vehicle the only approved installation method?I have reviewed the GO Focus Pro wiki/documentation, and I do not see anything that clearly states the device must be hardwired. The documentation also mentions that the GO Focus Pro can be used alongside a GO9, so I'm trying to understand the best/recommended installation approach.Any clarification on the following would be appreciated:Can a GO9 power a GO Focus Pro directly?Can an OBD splitter be used with the GO9 and GO Focus Pro OBD harness?Is hardwiring required, or just recommended?What is the official best practice for installing GO Focus Pro alongside a GO9?Thank you.

GO Focus Pro Power Options Hardwire Requirement

Hello, can you help me find out what type of OBD port and harness corresponds to this vehicle: MERCEDES BENZ, SPRINTER CHASSIS CAB, 2025, VIN W1X4K2HZXSN342801 

i have a 1989 GMC 700 and im trying to get a geo device hooked up.  i know there are not computers in this truck but if i know the pin out of the geo device then i can get power to the device for the tacking and mapping i just wont have any diagnostics of the unit. does any one have the pin out of a geo devoce. 

Older truck GO device install

Is there any Geotab documentation available on the installation of a harness to obtain engine data from a 2026 Mercedes Benz Sprinter unit?

Hey Geotab Community, We are working through a data issue with an EV Truck and Geotab. We are working with the Vehicle OEM as well, and if possible we would like to connect Geotab Support with their and our team(s). Overall Issues.The vehicle is using the J1939 protocol using the expected pins and other ELD devices are working. The Geotab device is powered.We are receiving GPS, fault and Geotab device specific data, but no other records or data are captured.  Essentially no data from the EC2 or Vehicle itself.We are working on gathering any related diagnostic data at this time.  Any ideas, thoughts or other related troubleshooting. Thanks,Davidg   

Issue with Geotab receiving data from an EV using the J1939 protocol

I have a 24Y1 harness installed, but it's detecting the ignition with only two wires. This is affecting the unit's ignition detection. Do you have any recommendations for a specific harness?

Which harness should I use with an FL360 2024 unit?

We are encountering a conflict about which port to use for our Telematics, and for future reporting of CTC testing. Paccar and Freightliners are requiring us to use the RP1226 and are demanding we remove telematics from the OBD port due to conflicts being caused (several have been encountered). However, we cannot use RP1226 for California CTC. Please provide guidance. 

California Clean Truck Check

How can i install a Go9 at forklift  ? have you aby guide ? 