I was driving home (in the rain) and pulled up to a stoplight under a bridge. Radio reception was fine. I turned on my rear fog lights (red at bottom of rear bumper) and a heinous static started.

THEY'RE HEEEERERE!!!!!!!!!!!


So when I flip the fog lights on, my radio gets staticy. One of you electrical wizards....same circuit or fuse or something? Is my Disco haunted? Is this my last communication with you all?

Go with God and pray that my creepy, haunted truck doesn't drag me kicking and screaming into the great beyond.....

 

You flux capacitor is loose.

The antennae are in the back side glass, and small RF amplifier up in the head liner. Not on same circuit, but may be in same cable bundle. You may be able to improve things by cleaning up the socket and ground on the fog light, and then you get to car radio noise reduction, like putting a .01 ufd capacitor across the fog lamp to ground, or at the contacts that drive it. Or a filter at the alternator.

See attached.

 

Try replacing the bulb in the fog lamp.

 

And another note, may not be a problem when you are not under the bridge, which would be a marginal reception area.

 

I turned it on and off as I drove home and it's the switch. I don't really care, nor does it matter. I rarely use the rear fog lights; I was just curious. Trying to learn what I can so that, when someone else asks, I can look smart.

 

Well, on the D1 the alternator noise suppression capacitor is out board, 2.2 ufd. Perhaps on the D2 it is inside alternator. If bad, could eventually make electronic noise to bother the stereo and other electronic widgets. Can test by doing same switch activity with engine not running. Ham radio operators spend a little time getting noise sources blocked so they can hear really weak signals.

 

It's ghosts. Pray for me and for my family.