Lost My Running Lights
Yup- Lost them. Coming home from a trip last week I noticed my running light were out, both front and back. Upon further inspection I found out my back up lights were gone too. Another oddity is my...
Forum Discussion
Normally, when your blinkers are fast, one bulb is not working. I would carefully inspect both front and back bulb sets with the red lens covers off. Blinker filaments are the large filament in a double filament bulb.
I suspect what has happened is the ground in the blinker that is not working properly has failed. Your running light circuit is also in that bulb. The power to the running lights comes to that bulb, but cannot get to ground, so it goes in the running light filament, can't get out on the ground circuit, so it goes back out on the brake/turn filament, goes over to another bulb and finds a ground.
Because the brake/turn filaments are so much thicker, they have less resistance. The voltage is now in series instead of parallel through the resistances.
Fix that ground at that bulb and you will find your running lights will work.
To test my little theory, take the bulb out of the socket and connect from the side of the bulb socket to a good ground. If this makes your running lights work properly on the coach, there is your problem spot.
I suspect what has happened is the ground in the blinker that is not working properly has failed. Your running light circuit is also in that bulb. The power to the running lights comes to that bulb, but cannot get to ground, so it goes in the running light filament, can't get out on the ground circuit, so it goes back out on the brake/turn filament, goes over to another bulb and finds a ground.
Because the brake/turn filaments are so much thicker, they have less resistance. The voltage is now in series instead of parallel through the resistances.
Fix that ground at that bulb and you will find your running lights will work.
To test my little theory, take the bulb out of the socket and connect from the side of the bulb socket to a good ground. If this makes your running lights work properly on the coach, there is your problem spot.
