I recently brought a used 2000 ford expedition it rained today and when I went to turn my lights on my raido went off i cut the lights off and the radio came back on. I had to keep the lights on I need to know why the radio cuts off and on when the head light are on what should I do?
I'm guessing here that you have an after market radio that someone connected into the light wiring, If you do have an after market radio you are most likely exceeding the amps of the light circuit.
Likely bad ground. Also check battery voltage when headlights are on. Most stereos shuts off when battery level drops bellow certain value
SOURCE: on my 2000 expedition when it rain heavy the
Most likely water leak around windshield on the left side dripping down into the GEM module which is located on the back side of the interior fuse panel/
SOURCE: WENT TO CRANK AN 2000 EXPEDITION IT HAD RAIN
this vech was famous for the windshield leaking on the driver side lower part of windshield.. and the water drips onto the gem module and inside fuse panel and can cause may electrical problems.. a good way to tell is remove the 2 big connectors with a 10mm socket and inspect for any water in connector or where connector came from
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