In Dash Car audio receiver

what vehicle are you putting it in, as if it was meant to be in the vehicle the wiring would be there already , if not forget it to much work and not much chance of getting it working properly anyway

Get your circuit tester out and check if you are getting a live feed with the ignition on and a live feed with the ignition off to the radio! Then check the earth wire is making a good contact! If this is ok then you will need to get the radio tested!

ALPINE VIE-X05 SD NAVIGATION SOFTWARE file need. my sd card is dad's plzz solution for me.

Model numbers and manufacturer are instrumental in solving these questions. Without them, we can't help.

The Nuvi 755T does not have bluetooth capability. See this link to see the specifications of the 755T from the Garmin website:
https://buy.garmin.com/en-US/US/prod14933.html
Bluetooth wireless technology No
You would have to have a Nuvi 765T to have bluetooth
https://buy.garmin.com/en-US/US/prod14926.html
Bluetooth wireless technology Yes (with A2DP technology)

You may download a copy of the manual from here.

You may view/download the installation and instruction manuals from Manuals User Guides for Sony XNV 660BT 6 1 Inch WVGA In Dash Receiver with...

Niether .... do you know what you have in hand? Both those extras costed someone some cash ... OK here it is: the CDA-9884 has a dedicated input for ipod (a KCE-422i cable is needed and comes with the new CDA-9884 in the box) ... The HD radio unit allows you to recieve new HD radio signals (digital radio, and stations that have it in your area may also have extra music streams like HD TV does). The bt-400 is a bluetooth adapter to use bluetooth enabled devices with such as a cell phone. If your ipod has bluetooth you could used the bt adapter but I suggest the KCE-422i cable instead, and check out the HD radio too, it's pretty cool.

The Nuvi 750 does NOT include bluetooth capability. I don't know what you saw, or what you think you saw, but Garmin's website is very clear on this issue. NO BLUETOOTH WITH THE NUVI 750

If you have a vehicle that can fit a 'double-din' sized radio, I would suggest the Pioneer AVH-P4000...$500 without the extras. Easy to add an i-pod cable, has back-up video hookup. Also bluetooth ready as has capability for satellite, hd radio, and tv tuner if you ever wanted to add them.