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They are in a lower compartment of my 85. I noticed when one is in a certain position, the engine wont start.
I'm assuming the coach battery is for the lights and electrical inside, and the chassis battery is for the engin, and maybe the outside marker lights?
Also, next to the brake pedal, on the floor by the driver seat is a small round "pedal" that you can push down with your foot, then further to the left is some kind of air gauage. Any idea what the floor pedal is for? It just sticks out of the floor.
Do you know if you have gearvendor on your trans? Switch maybe for that.
I wonder is that a dimmer switch for the head lights, does it click when you push it if so check the headlights.
25 Ft Glassnose, 2792, 1982
Plain Jane Interior
Picture by Kevin
There is great variation in the wiring of these coaches, but the disconnect switches (or remote disconnect relays) attempt to isolate the two battery banks from discharge while being stored.
As you suggest, the chassis battery is used for starting and all exterior running lights. Isolating it will prevent starting. IMHO this is usually not needed since the chassis does not usually have much current drain and will hold charge for some time.
The coach batteries are used for all accessory power. Interior lighting, pumps, fans, etc. Often there are devices with clocks, etc which will drain the battery. A master switch can help avoid deep discharge of the coach batteries over time. However, if you have any solar panels charging the batteries, they must be connected ahead of the disconnect switch or no charging will occur.
86 Regal SE 33 Tag axle--"98" Monarch 37
Chev P3(7) 454TBI--------Spartan MM, 6 spd Allison
400 hp fuel injected-------Cummins 8.3 300 hp
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