When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
,,,had no tailights or front running lites so I replaced the main switch....then I had both, for a few minutes. Turned off and on, and then had just front runnning lites. Now, I sometimes have one, both or none......
1. What year car?
2. What illuminates when the light switch is half way out (parking lights on)?
3. What illuminates when the light switch is all the way out (head lights on)?
..it is a '65....half way out I get both running and tail lights.....all the way, I sometimes get headlites and taillights but no running lights up front....
No front parking lights with headlights on is normal.
If your headlights are on for a short time and go out (with the handel pulled all the way out) there is a short in the wireing. Headlight switch has a circuit breaker built in.
63 is right about head lights versus parking lights (they weren't called running lights then). He is also right about the circuit breaker . It seems somewhere I read that it doesn't just cut off though. It actually "blinks" the lights so that if you have a problem at night you don't totally wind up in the dark or smoke your wiring with a dead short. It will try and give you something to limp home. Certain that John Z would know if this is right or in error.
The car headlamp circuit breakers are automatic thermal reset type - similar in function to those found in most small appliances (hair dryers, etcetera) - not like the manual reset breakers in most modern home power boxes. If an overload heats the breaker it disconnects the circuit until the breaker cools - may take seconds or minutes.