SiRAC HRN-CW08K4 8 Wire Harness Kit Instruction Manual
- October 30, 2023
- SiRAC
Table of Contents
SiRAC HRN-CW08K4 8 Wire Harness Kit
Product Information
The PAC-INSCW08K4 is a custom 8-wire harness kit designed for vehicles with no supported connectors. The kit includes a harness and a fuse kit, and it requires HRN-CM24Y1 to function properly. The wire colors of the harness are red, black, blue, white, brown, green, orange, and grey. The harness needs to be connected to power, ground, and at least one BUS for it to work. The product comes with instructions on how to identify networks, wire color definition, and power sources.
Wire Color Definition
- Red – Power Source
- Black – Vehicle Ground
- Blue – J1939+ / CAN+
- White – J1939- / CAN-
- Brown – J1850- / J1708+
- Green – J1850+ / J1708
- Orange – ISO K-line
- Grey – ISO L-line
Network Identification
To identify networks, look for twisted pairs with approximately 1 twist
every inch (25mm). If they are not labeled as CAN+/CAN- or JBUS+/JBUS-, you
will need to perform a voltage test using your digital voltmeter in DC mode.
The following table shows the network to identify, color, and measure relative
to the ground, multimeter reading, and notes:
| Network to Identify | Color | Measure Relative To | Multimeter Reading | Notes |
|---|---|---|---|---|
| CAN+ | Usually yellow | Ground | 2.5 – 3.0 VDC | Note that your actual voltage |
levels may vary. The key is that
CAN+ voltage is higher relative to CAN-. See the * NOTE below for
more information.
CAN-| Usually green| Ground| 2.0 – 2.5 VDC| Note that your actual voltage
levels may vary. The key is that
JBUS+ voltage is higher relative to JBUS-.
JBUS+ (J1708/ J1587) (RS-485)| JBUS+| –| 3.0 – 4.5 VDC| –
JBUS- (J1708/ J1587)| JBUS-| Ground| 0.5 – 1.5 VDC| K and L lines if not
labeled require interface point from the
manufacturer.
To confirm that you have the CAN bus, use a multimeter and verify that the resistance between the two CAN lines is approximately 60 ohms. It is important to note that the battery must be disconnected when doing this test.
The GPS antenna is located at the bottom of the device, and it must face skyward. To connect the device, start the engine and leave it to idle. All three LED’s will flash red briefly – wait until you see all three LED’s: Red (Power), Green (GSM), and Blue (GPS). These tell you the unit has connected successfully. During this five-minute process, the unit will also beep repeatedly as it updates to the latest settings. You can log on to https://installmygps.com and enter install details as prompted.
Product Usage Instructions
Before installation, ensure that the GO device is disconnected from the vehicle. Post harness/IOX installation, connect the GO device, read and follow all instructions and warnings to prevent serious injury and/or vehicle damage. It is also important to read the important related Safety Information and Limitations of Use following these installation instructions.
For the most up-to-date version, please visit: https://gtb.page.link/pYFV.
Description
Custom 8-wire harness kit for vehicles with no supported connectors. Requires HRN-CM24Y1. The custom kit contains the harness and a fuse kit. For the harness to work, the installer must connect power, ground and at least one BUS.
Wire color definition:
Red| Power source
Black| Vehicle ground
Blue| J1939+ / CAN+
White| J1939- / CAN-
Brown| J1850- / J1708+
Green| J1850+ / J1708-
Orange| ISO K-line
Grey| ISO L-line
How to identify networks
Look for twisted pairs, approximately 1 twist every inch (25 mm). If they are not labeled as CAN+/CAN- or JBUS+/JBUS-, then you will need to perform a voltage test using your digital voltmeter in DC mode.
Network To Identify|
Color
| Measure Relative To| Multimeter Reading|
Notes
|
---|---|---|---|---|---
CAN+| Usually yellow| Ground| 2.5 – 3.0
VDC
| Note that your actual voltage levels may vary. The key is that CAN+ voltage
is higher relative|
| | | |
CAN-| Usually green| Ground| 2.0 – 2.5
VDC
| to CAN-. See the
*** NOTE** below for more information.
|
JBUS+ (J1708/ J1587) (RS-485)|
–
|
Ground
| 3.0 – 4.5
VDC
| Note that your actual voltage levels may vary. The key is that|
JBUS+ voltage is higher relative to JBUS-.|
JBUS- (J1708/ J1587)| –| Ground| 0.5 – 1.5
VDC
|
K and L lines if not labeled require an interface point from the manufacturer.
NOTE:
To confirm that you have the CAN bus, use a multimeter and verify that the
resistance between the two CAN lines is approximately 60 ohms. ! IMPORTANT:
The battery MUST be disconnected when doing this test.
Connection
IMPORTANT: Ensure that the GPS antenna is facing skyward.
Start the engine, leaving it to idle. All three LEDs will flash red briefly – wait until you see all three LEDs: Red (Power), Green (GSM), and Blue (GPS). These tell you the unit has connected successfully.
- During this five-minute process, the unit will also beep repeatedly as it updates to the latest settings.
- Log on to: https://installmygps.com.
- Enter install details as prompted.
Professional Installation Required
Installation of the HRN-CW08K4 requires the installer to have sufficient technical knowledge and expertise for Off-road equipment installation, i.e. Certified Geotab® Installer certification or equivalent.
WARNING!
Read important related Safety Information and Limitations of Use following
these installation instructions. The GO device must be disconnected from the
vehicle prior to harness/IOX installation. Post harness/IOX installation,
connect the GO device, read and follow all instructions and warnings to
prevent serious injury and/or vehicle damage.
For the most up-to-date version, please visit: https://gtb.page.link/pYFV.
References
- Telematics Device Installation & Warnings - Version 9 Device [PUB]
- Limitations of Use Rev 1.1 [PUB]
- MyAdmin
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