RDAC VD Reference Ground to Engine Block

RDAC VD Reference Ground to Engine Block

On the RDAC VD, the Reference Ground wire is the bottom terminal on the RDAC, labelled REF GND. This terminal should go straight to Engine Block.



Important: Read this article on why an Engine Block Reference Ground is critical for accurate engine sender readings. If your oil temp, oil pressure and RPM / tach engine senders are not reading correctly, this is the first thing to check.




    • Related Articles

    • RDAC XB and XD Reference Ground to Engine Block

      With the RDAC XB or XD, the Reference Ground wire is the Black Ground wire that comes out the top of the RDAC, together with the Red Power Supply Wire. This wire should go straight to the Engine Block. Note: It is acceptable to Setup a Ground Bus on ...
    • RDAC XF and XF MAP Reference Ground to Engine Block

      The RDAC XF and XF MAP Pins 5 and 9 on the DB9 connector are connected Directly to Engine Block Ground Note: It is acceptable to Setup a Ground Bus on the Firewall where all of your senders that require an Engine Block Ground are Grounded. This Bus ...
    • Infinity and Velocity Singles Reference Ground to Engine Block

      The Infinity and Velocity Singles Reference Ground wire is always labelled as such in the manual, and there might be one on each connector. They can be tied together and run to the Engine Block. Important: Read this article on why an Engine Block ...
    • RDAC VD Manual

      Attached is the RDAC VD Manual ​
    • Grounding Instructions - Engine Senders and Probes Reading Incorrectly

      If your Oil Pressure, Oil Temperature, CHT, EGT or RPM / Tach is reading incorrectly (low, high, intermittent), the very first thing to check is the Reference Ground to the Engine Block. About 95% of all sender reading troubles are related to ...