Re: watch a dvd while driving pioneer AVH-P4000 DVD
Ground the wire to a hot (ie power comes to the wire) switch in your dash, like a rear window defroster or seat heater. turn the switch on then off and it will trick the system into thinking you activated the parking brake.
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Right after I send my problem with my p4000, I found what's where wrong... I forgot the little black wire ground. I simply put wires togheter (the big on and the small) and now, it works !!! I can see pictures and sound from DVD and listen music with USB flash drive...
Having the car in "park" is not the key. The unit needs to see a 'ground' on the light green wire that attaches to the parking brake. (see manual). You can get around this by installing a toggle switch OR a relay that will user the 'amp remote' wire as the trigger.
Just wanted to add my 2 cents for those who might be having the issue of no video but hear audio. I was having the same problem. I had completed the bypass hack with a single throw/single pole (SPST) toggle switch. I could bypass the warning message and hit the OK button but no video. I did hear audio. I searched everywhere but solution 4 worked for me. The thing for me was that next to the black wire on the harness wasn't empty. It had a purple/white wire with some sort of filter (labeled backup camera hook to reverse gear). I tied into this wire before the filter with another wire (I chose a black wire b/c I was grounding it) and grounded it with the black wire (ground) on the harness. I now have video! Maybe the 4 pole relay hack would have worked better but I had only done the toggle switch hack. I hope this helps others and most importantly thank you Salhi.
This what you do. Connect the video wire to a power suppy and install a switch in the power wire. When you put the DVD in and the warning comes up, turn the switch on then off. This will allow you to watch the DVD without the park brake being applied.
Do you have the green cord that attaches to the parking break hooked up?
This stereo is designed so that you cannot watch videos while driving, therefore you need to have the parking break on in order to get video.
when you play a dvd with out the parking break on, you will only get sound.
You probably need to get the handbrake switch wire properly attached to the handbrake switch. Some people have also used a toggle switch or something and run the handbrake switch wire to that and the wire from the handbrake switch to a ground on the vehicle, then you just have to flick the switch off and on EVERYTIME you start the car to do the bypass.
Though what I'd really suggest just getting a 4 pin relay and do a bypass. You can also use a 5 pin relay and do it, just don't use the 87a pin. Another clean way to do it would be getting a PTR 7 but this costs a bit more and needs to be programmed. This should allow you to look at DVD's with vehicle moving or not.