Topic: Tail light quit working - CB750F1

[Tugboat]

My buddy noticed last weekend that my tail light is out. Brake light works, but running light does not. Replaced the bulb - still nothing. Likely a connection came undone?

[MoMo]

Measure voltage at the brown wire.  There are connections under the housing and another under the seat.  Also, the ignition switch could be defective as the brown wire feeds from there.  Not sure if your model has a fuse for the tailight...Larry

[Tugboat]

Thanks - this at least gives me a place to start from

[MoMo]

You are welcome.  Most common problem I see is the connection under the seat coming apart...Larry

[Tugboat]

So I can unplug the brown wire @ the tail light - brake light still works, tail light doesn't work. Cleaned the connector and reattached - still doesn't work. What do I check next?

[MoMo]

So I can unplug the brown wire @ the tail light - brake light still works, tail light doesn't work. Cleaned the connector and reattached - still doesn't work. What do I check next?

You need to check to make sure you have voltage at that wire.  If you do not have a multimeter(working on vintage Hondas having one is mandatory) go to Harbor Freight and buy an inexpensive one-should be less than $10...Larry

[ChuckG750f1]

One of the 7A fuses is for the taillight!  If it's not the fuse or a connector, it may be bad contacts in the ignition switch (that's how the 12V gets to the fuse).

[Tugboat]

Now there's your problem:



Guess this will have to do for now. Fix it right this weekend

[MoMo]

Good work, and there are waterproof connectors  available like your temporary fix...Larry