Jvc KD-AVX33 Parking brake problems

[csnut18 10+ year member]

Hey everyone, I installed a JVC KD-AVX33 today and it sounds amazing. I was looking at the instruction manual which seems to say although not clearly that the parking brake wire on the HU needs to be hooked up to the Positive(Not the negative) parking brake wire on the vehicle. Knowing this, I went ahead and hooked the wire to the acc wire on the vehicles wire harness together with the acc wire hooked up to the HU. The wire is working fine as the jvc turns on and off with ignition. the parking brake lead is tied into the same wire with a very secure connection. The problem is that the unit is not allowing me to watch dvd's because it is not detecting the parking brake. I don't know why the hell this is happening. I am supplying 12v to the parking brake lead like I am supposed to. I double checked everything and tested all the wires only to find everything is working as it should. The only thing possible is that the unit needs to have the parking brake wire hooked up to a ground. I have seen owners manual wrong before. What do you guys think? Thanks

Click to read more...

 

[ngsm13 5,000+ posts]

Hey everyone, I installed a JVC KD-AVX33 today and it sounds amazing. I was looking at the instruction manual which seems to say although not clearly that the parking brake wire on the HU needs to be hooked up to the Positive(Not the negative) parking brake wire on the vehicle. Knowing this, I went ahead and hooked the wire to the acc wire on the vehicles wire harness together with the acc wire hooked up to the HU. The wire is working fine as the jvc turns on and off with ignition. the parking brake lead is tied into the same wire with a very secure connection. The problem is that the unit is not allowing me to watch dvd's because it is not detecting the parking brake. I don't know why the hell this is happening. I am supplying 12v to the parking brake lead like I am supposed to. I double checked everything and tested all the wires only to find everything is working as it should. The only thing possible is that the unit needs to have the parking brake wire hooked up to a ground. I have seen owners manual wrong before. What do you guys think? Thanks

You can toggle the polarity in the unit itself, should be able to change it.

Then I'd recommend ground it with a toggle switch inline to throw ground when switched. I believe the new JVC's need to see switched ground.

nG

 

[csnut18 10+ year member]

If you look at the owners manual, there is a diagram which seems to show that the parking brake wire needs to see positive for the system to play dvd's. Nowhere in the owners manual does it say that this needs to see a sequence like some of the other manufacturers. I checked all the settings and options and there is no option to change the polarity in any of the programming menus on the HU. So you think I should try and ground the wire to see if that helps? Will I fry anything if the system really needs positive just switched. The owners manual has nothing on this so please help!

 

[ngsm13 5,000+ posts]

Well, I know for a fact you are able to choose on the AVX2... haven't had hands on with the AVX33 yet...

Let me look around...

nG

 

[ravendarat 10+ year member]

ground it and call it a day. I install these things all the time, regardless of what the manual says it comes preset for neg input

 

[csnut18 10+ year member]

I am going to ground it tom. I hooked it up to the 12v acc cause the manual said to give it 12v, do you think I could of damaged the unit?

 

[csnut18 10+ year member]

Ok, the situation is resolved. Everyone should know that JVC has a owners manual that is completely incorrect. There are many errors in there and a good example is that they state the parking brake lead must be connected to the positive side of the parking brake switch on the vehicle what BS. I just grounded the wire and I am watching movies.