Usually this is caused because the SSD was installed, and the thermal sensor cable was neglected. Unfortunately the Mac gets confused and runs the fans high to compensate. OWC has a kit for the SSD's Link to Part Try this. There is apparently software alternatives, but I cannot recommend as these kits are all that I have used. Hope it helps! Good catch on saving the Mac, and happy repairs.
To truly understand the problem, and how to fix it, you should try and provide more information. Such as: which model of JBL Charge do you have? What devices are you having problems pairing to the speaker? Moving on however, if some of the devices are not pairing, it could be a couple of things. Maybe the drivers are not updated? Good site on how to update Also, you can try restarting the other devices, or even the speaker, to see if that would help with the connection.
You have a wifi only device, and with that, you will not be able to utilize it as a cell phone in a traditional sense. However, if you have access to Wifi, either through traditional ISP or a wifi hotspot, you can use apps like hangouts, or Skype, to make make phone calls. I had to do this at one point when my phone was FUBAR, and I needed to make calls. With that being said. The very same data could be utilized, for google maps. Your device does have GPS according to its specs so you should not have a problem.
If you are trying to erase the data on your google searches, the most effective way is by going to myactivity.google.com/. Here you can go into your accounts complete history, and change settings. Click on "Delete Activity By". There you can select more specific drop downs. I hope this is what you are looking for, and hope it helps.