2004 Can a malfunctioning Garmin GPS screw with the cars performance?

[OREOCAT]

I plugged in my GPS and now my blinker quit and my battery drains.

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[RDH]

I plugged in my GPS and now my blinker quit and my battery drains.

Why I use my Phone , WAZE works great

 

[biddle]

I plugged in my GPS and now my blinker quit and my battery drains.

Very easy to determine. Stop using the Garmin for a couple of days.

This sounds like an FEM problem. See https://forums.fordthunderbirdforum...ectronic-module-fem-2002-2005.5560/post-35306

 

[The Flash]

It may. I think you should have your battery tested to be sure it is in good condition.

 

[Mach5]

A weak/failing battery can cause all kinds of problems.

 

[Frankie the Fink]

I don’t see how a plug-in Garmin can affect anything. They only draw milliamperes of current and use passive antennas.