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  3. HDX-78C-VET

Dakota Digital HDX-78C-VET Mounting Manual

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  • What is included in the HDX-78C-VET kit?
    How do I remove the stock main gauge cluster and the center gauge cluster from the dash?
    What should I do with the stock gauge assembly from the center gauge bezel?
    How do I install the block-off lenses?
    How do I secure the HDX center gauges?
Manual # 650661
HDX-78C-VET
Dakota Digital HDX Instrument Installation
For 1978-’82 Corvette
Your new HDX-78C-VET kit includes:
Installation
Control Box
(5) 1” Screws
Universal Sender Pack
Installation Manuals
HDX Displays
1. Remove the stock main gauge cluster and the center gauge cluster from the dash and save all center
gauge hardware for reassembly.
(3) Block-Off Lenses
Clock Harness
Y Harness
(2) Main Harnesses
Manual # 650661
only items to be reused are the front bezel and the gauge mounting
hardware. Now is a good time to clean or refinish the bezel.
3. Peel the paper off the two block-off lenses needed
(636234-A and 636234-B) and place them shiny side
down in the two rectangular openings. Use silicone to
hold them in place and avoid handling until the silicone
has cured.
636234-B
636234-A
4. With the block-off lenses in place, position the HDX center gauges over the back of the center
bezel and secure the system by using the four (4) stock mounting screws.
5. Attach a main harness and the clock harness to the back of the HDX display.
Carefully route the other ends of the main harnesses to the control box mounting
location as the display is installed into the dash using the factory hardware.
Manual # 650661
8. Refer to the main manual for wiring instructions to complete the HDX installation.
7. Connect the provided Y harness to the control box so both main harnesses can be connected.
6. Connect the main harness and the buzzer (optional for audio feedback) to the back of the HDX main
display; carefully route the other end of the main harness to the control box mounting location as the
display is installed into the dash using the five (5) supplied 1” screws.
Buzzer Connector
Manual # 650661
WARNING: This product can expose you to chemicals including lead, which is known to the State of
California to cause cancer and birth defects or other reproductive harm. For more information go to
www.P65Warnings.ca.gov
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