1946 Cessna 140 Nav light circuit breaker

8147 · Post by **8147** » Sun May 06, 2018 2:58 pm

I own N89107 a 1946 Cessna 140 with a Continental C90 engine and mostly stock electrical system. There was an intercom and upgraded radio installed years ago along with a Universal strobe light assembly. The lights have been fine up until about a month ago. Now when I turn on the Nav lights the instrument lights (on the same switch) come on very dim for a second and the circuit breaker pops. I have tried taking out all the light bulbs in the Nav lights and instrument lights, but it still pops. Any idea what is shorting, or where to start looking? Any help would be appreciated.

8170 · Post by **8170** » Sun May 06, 2018 4:39 pm

Check the wiring to the bulb sockets and make sure one of the hot leads isn't touching any metal.

8147 · Post by **8147** » Fri May 25, 2018 11:00 am

That was it! Grounded old socket. Had it fixed and it’s working great! Thanks for the help.

8170 · Post by **8170** » Thu May 31, 2018 2:03 pm

Great news.

The Cessna 120-140 Association Forum

1946 Cessna 140 Nav light circuit breaker

1946 Cessna 140 Nav light circuit breaker

Re: 1946 Cessna 140 Nav light circuit breaker

Re: 1946 Cessna 140 Nav light circuit breaker

Re: 1946 Cessna 140 Nav light circuit breaker