Connections

[wizzy]

Hi I have reposted this question and tried to explain my question a bit more

 

I will be fitting an Alpine touch screen monitor into the central glove box on my Galaxy

Before final fitting into the car I decided to try it out

I have a motor cycle battery which I used for the 12V supply

The unit switches on and works great the problem happens when I try to use the set-up screen

It has a message stating this feature cannot be used whilst the car is in motion

There are two cables that normally would connect to the hand and foot brake

The instructions state connect this lead to the power supply side of the switch but the is the same as putting a 12V supply onto the connection

Does anybody know if this is correct?

[insider]

You need to find out what function these cables perform - doesn't it explain this in the instructions?

I can sort of understand the handbrake switch, i.e. the screen would only work when the car is stationary with the handbrake applied.

I can't understand the reason for the footbrake switch because this would provide an intermittent signal, i.e. only when the brake pedal is pressed.

 

Anyway, connecting to the power supply side would mean that the screen is looking for a path to ground when the switch is activated. Therefore, you should be able to test this by connecting the cables to directly to ground. The screen would then "see" both switches activated. But, not knowing the function of these cables and what signals the screen is looking for means it's pure guesswork at the moment. Could you post more information from the instructions?

[wizzy]

Hi thanks for the reply.

 

The exact wording is

Hand Brake Lead

Connect this to the power side of the parking brake switch to transmit the parking brake status signals to the TME-M740BT

Foot Brake Lead

Connect to the vehicles foot brake lead or brake lamp lead

[insider]

Hand Brake Lead

Connect this to the power side of the parking brake switch to transmit the parking brake status signals to the TME-M740BT

Connecting to the power side of the Galaxy parking brake switch will provide 12v when the handbrake is off and 0v when the handbrake is on.

 

Foot Brake Lead

Connect to the vehicles foot brake lead or brake lamp lead

This works in the opposite way. Connecting to the black/red side of the switch (red/yellow is the 12v supply) will provide 12v when the brake pedal is pressed or 0v otherwise.

 

So, I would suggest you put both leads onto the negative terminal of your motorcycle battery to test. I assume from what you said that it didn't work with these leads left unconnected?

[insider]

It's also possible that a sequence of signals is necessary to unlock the safety feature. Does it say anywhere in the user (not installation) instructions about this, e.g. press the brake pedal and engage/release the handbrake twice?

[wizzy]

Hi thank you for responding to my question. I have tried the connections suggested but it still will not operate.

 

The only thing I can find in the instructions is a statement

 

Operation of some of the functions of this unit are very complex.

Because of this, it was deemed necessary to place these functions into a special screen.

This will restrict operation of these functions to times when the vehicle is parked. This

ensures the focus of the drivers attention will be on the road and not on the screen. This

has been done for the safety of the driver and passengers. The set-up operation cannot be

made if the vehicle is moving. The car must be parked and the handbrake engaged for the

procedure described in the owners manual to be valid. The warning "Operation is not

allowed while driving" will be displayed if any attempts are made to perform this operation

while driving.

 

I did try telephoning Alpine but never got through. The technical department was always

busy. I therefore emailed Alpine for an answer as this unit is sold as a plug and play system.

No response yet