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Originally Posted by ashrafkh
ya i noticed the same from other threads but the seller i bought the RCA cable from said that i need only to connect into PIN 17 on the blue connector to get the ground.. so since PIN 17 provides ground why would i need a relay unless its a power stablity issue
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To activate ReverseCam, pin17 needs to be connected to ground.
You can connect it to ground using various methods such as a manual switch.
If you want the reverse camera to come on automatically when selecting reverse gear, you have to switch the pin to ground through some circuit in the car.
The simplest and most convenient circuit to use is the reverse lamps. However, these have 12V when on, ie: they do not switch to ground.
How to change a 12V-when-on to a ground-when-on switching signal?
You could use a circuit built with opto-couplers, transistors, FETs, even glowing valves if you want.
But the easiest, simplest method is a relay.
04-07-2009, 12:42 PM
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