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Message: <blockquote data-quote="zane" data-source="post: 386293" data-attributes="member: 540617">Doesn't sound like it needs to be grounded.    It sounds as if that wire needs to recieve a + (lead) voltage to it to engage the video display.Using a test probe, measure the voltage on the + (lead) wire from the e-brake while it is engaged.   (should be a standard 12 V - but better to test and be sure.)All you would need to do then is install a + (fused) wire and connect it to the proper wire on the unit itself.You would essentially be bypassing the switched + On signal that is sent from the e-brake to the light when the brake is engauged.   Instead, you would have a constant signal (rather than switched) effectively "fooling" the unit into displaying video.</blockquote>

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