Originally Posted by High Life
no hot spots or melted areas around the switch itself and haven't dug too far into the boat to see if anything else has melted or gotten hot.If it was as simple as 2 wires for the lights going to the battery it would be a no brainer but since the wires go from one switch to another I don't feel like running the risk of tearing into it and making everything else including my lights not work!
High Life, I am willing to help you over the phone with troubleshooting this issue, just PM to arrange time.
Hopefully my post wont confuse you,
That is normal to jump the connection from one gauge to another.
Every device, light, house light, Nav light or any "switched" accessory will be wired as follow:
Device will have 2 posts *** and NEG (or ground)
1- The Ground goes directly to a ground post in your panel or fuse ground bus/block
2- The positive will go the one side of your switch at the helm.
Your switch at the helm will have 2 wires:
3- The wire that is coming directly from your nav light positive post.
4- Wire that is going to your fuse box positive
Once you flip the switch that closes the circuit and Blip you have light.
To troubleshoot your NAV light issue....
Easiest way to do, is get 2 long wires, one end of the wires plug them directly to your positive and negative. The other side, touch them to your positive and negative side of your NAV light base.
No light then it's your light base or bulb, or corrosion etc.
Get light then keep on going with troubleshooting steps below
- Start at the light end.
1- Turn the battery switch on
2- Make sure you have power (test the horn for example to confirm)
3- Turn the NAV light switch in question to ON
4- Go to the NAV light and With voltmeter test that you have power there (should get reading of 12v ) by touching the black post of ur tester to the (-) side of the NAV light base and the red post of ur tester to the (+) side of the NAV light Base.
If you get reading (or volts) then it must be a bad bulb or lose NAV light base or corroded etc.
If you don't get reading "volts", now the fun begins..
You need to identify which part that is not working..You have:
1- The ground and hot (or positive) wire from your light to the switch
2- You have the wire from your switch to the fuse box.
3- You have the Fuse
4- You have the switch itself.
To test #1 above you will need to get 2 long wires , start with positive plug the red wire into your switch (the knob at the helm), turn the switch to ON, then touch the red to the base of your NAV light and Ground
Get light, great then u know what to do.
No Light, then use your long wire, connect it to a good ground post in your panel that u know it works...then touch it to the back of your negative side of your NAV light base..
Light?? good then you know what's at fault.
Then you validated that your wiring from the switch to your NAV light is good.
Now you can test the switch (knob) and your fuse, by perhaps swapping them with good ones that you know are working.
Check this out may help explain more:
Standard Boat Wiring Diagram