The original switches for nav lites, bilge pump, etc. were the push pull type with a boxy shaped back to which the wires were plugged. I was forever leaving something on and running down the batteries. What to do? I decided to put a red light along side each switch.

Went to radio shack and saw some lighted rocker switches:d/ aha, kill two birds with one stone, use the old switch holes for new ones, no add'l drilling for lights, and as an added bonus, eliminate the boxy space using old switches. In the pic, the anchor lite switch is on.

While diddling around I decided to add an oil pressure light and buzzer (it's to the left of the tach next to the oil pressure guage. It is illuminated too. ) and while i'm at it I added a light (just to the right of the ignition sw.) so when I turn the key on it lights up. If the engine dies for some reason, its a reminder that the ig. is on. Another reminder that you have turned the key on is the oil light comes on and the buzzer sounds because until the engine is started, there is no oil pressure.

I would like to add a lite and buzzer to warn me if the engine is overheating. Unfortunatly I can't find a plug to remove from the intake manifold to install such. Anybody have any ideas? The other pics on this post show access behind the dash via the medicine cabinet in the head. since I was doing a lot of work cleaning up the spagetti behing the dash, I cut out the area below the medicine cab. for much more access.

clarko attached the following image(s):

It looks like the early models use fuse blocks instead of Airpax breakers. In later models wires connected the bathroom distribution panel to an overhead breaker switch panel. Blown fuses can be inconvenient but you can easily tailor the fuse to protect the devices not just the wiring. Do you get many blown fuses?