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Aren't they just always on? Also the modem would have to be on the other end of that cable loom for that to work when it's much more likely to be down in the gl
by rtkwe 8y ago
Aren't they just always on? Also the modem would have to be on the other end of that cable loom for that to work when it's much more likely to be down in the glove box with the rest of the control modules and you don't need an antenna that long for a WAN modem.
- londons_explore 8y agoYou probably want the antenna away from all the metal body panels of the car. Hence normally running a cable up the A pillar. The modem itself probably isn't booted up to reduce vampire power drain. If it was always on, it would drain the battery after a few weeks. More likley, when the alarm goes off it starts booting up.
- rtkwe 8y agoMy cell phone still gets decent signal sitting down in the center console in the cubby below the entertainment system, enough to stream music at least which is more than it'd need for an SOS function. If your phone can send a text it's got more than enough signal to do the SOS functions.