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5. Verify that the Ethernet Injector case is now grounded using a multimeter. Set the
multimeter to the continuity test setting
(Figure 7)
a. Set multimeter to continuity test
b. Unplug the 4-pin power cable from the Ethernet Injector
c. Follow directions for setting your specific multimeter
(e.g., How to Test for
Continuity with a Digital Multimeter | Fluke)
d. Place one lead on
1. Any of the Ethernet Injector chassis screws or
2. The scuffed surface of the Ethernet Injector tab
e. Place the other lead on the vehicle chassis near the grounding point
f. If the test does not pass:
1. Check the grounding connections at all points
2. Ensure that the mounting fasteners are made from a conductive material
3. Ensure that the connection point to the vehicle chassis is conductive (no
rust, paint, etc)
4. If grounding method #2 is used then ensure the mounting tab is
sufficiently scuffed
6. Use an inline 5A slow blow fuse for over-current protection.
7. Connect the following
(Figure 8)
:
a. Red wire to +12VDC that is always-on, even when the ignition is off
b. Black wire to ground (not directly to the vehicle battery)
Figure 7
