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Old 02-17-2024, 11:29 AM   #1
Join Date: Nov 2022
Posts: 43
Year: 2008
Coachwork: IC
Chassis: CE 300 man. 2006
Engine: 2006 DT466 with egr
Rated Cap: 20 with 5 handicap
CE300 battery switch possible?

I have a dual battery CE300 that I would like to add a battery cutoff switch.
The problem I have is the system uses 2 wires (000 and 0000) for each of the negative and positive leads (4 wires in total), plus a negative and positive lead for the electronics (TCM etc...).

More details: The 2 + terminals are both connected to each other with a 00 wire. Then one terminal has a 000 wire connected to it (goes to starter?) and a group of smaller gauge wires that go to the computers. The other terminal has a 0000 wire connected to it (goes to starter?). It is hard to see where the wires go around to the starter.
There is a .25 amp constant draw (the dashboard & computers?) measured from either the small group of wires or the 000 wire. That leads me to think only the 0000 wire goes to the starter.

If I wanted to add a cutoff switch it seems like I would need either:
two cutoff switches, one for each set of wires off each terminal
Some kind of bus bar to combine the 000 & 0000 wires together. This seems like I would then need an effectively 0000000 wire and a beefy bus bar.

Either option seems difficult and expensive.
Does anyone have a solution this kind of system for a cutoff switch?

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Old 02-17-2024, 12:31 PM   #2
Bus Crazy
ewo1's Avatar
Join Date: May 2015
Location: Central Tx.
Posts: 1,986
Year: 1999
Chassis: Amtran / International
Engine: DT466E HT 250HP - Md3060
2007 CE chassis only electrical diagrams

Neither option seems difficult or too expensive...take it one step at at a time!

Here is a chassis electrical diagram from the 2007 BE/CE service manual. This will help you better understand what you are working with.

The entire manual is almost 3 megs so I broke it down into two parts.

The "12v power distribution" is only one section (8 pages) of the manual, the "battery" chassis electrical only.

The two other files are part 1 and part 2 of the entire manual.
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