Jake Brake Problem on my bus
Just an update on the Jake Brake problem. It turns out their is level one and level two Jake brakes. I believe the level one (low) position involves a couple of cylinders per bank and level two does all the cylinders.
Anyway when you have level two the low position is to activate just one bank and the high position is activate both banks which requires the three position switch.
The wiring diagram for my bus indicated only one control wire from the front to the back, which is what you need for level one. More wires are needed for level two control. So the operator manual indicating a off/low/high switch was a red herring.
I found the wire from one bank hanging loose and not attached to the throttle buffer switch.
Before reconnecting I measured the resistance on the connected bank and the disconnected bank.
The connected bank was 16 Ohms and the disconnected bank was 24 Ohms.
Simply attaching the wire did increase the effectiveness, however still not a robust response or change in the exhaust sound when engaged.
However when I turn if off while engaged it is more a definite effect/feedback.
https://www.crystalpoint.com/cpdownl...rakeSwitch.jpg
Looking from the back of the engine; yellow is a wire going to the left bank, red is a unused terminal and blue is a wire going to the right bank of the engine that isn't hooked to anything.
Below is picture of the wire coming out of the right bank and there is similar one on the left bank.
https://www.crystalpoint.com/cpdownl...eBrakeWire.jpg