One word - Condensation - check your "computer case" under you hood for any cracks, leaks, moisture etc. It can also be the weather seal, open box and check for moisture, mildew smell. Fuse boxes can be equally damaged. Check the owners manual to see how many fuse boxes you have and check them too. There's usually one under the dash and one under the hood. If none of that works, find the ground wire from the engine to the car body / frame. Single thin black wire attached to with a single screw or bolt, if it's loose, that could be it too. Good Luck. Grimm
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One word - Condensation - check your "computer case" under you hood for any cracks, leaks, moisture etc. It can also be the weather seal, open box and check for moisture, mildew smell. Fuse boxes can be equally damaged. Check the owners manual to see how many fuse boxes you have and check them too. There's usually one under the dash and one under the hood. If none of that works, find the ground wire from the engine to the car body / frame. Single thin black wire attached to with a single screw or bolt, if it's loose, that could be it too. Good Luck. Grimm