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Topic: Does EXHUAST BRAKE lite come on when key is turned... (Read 676 times) previous topic - next topic
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Does EXHUAST BRAKE lite come on when key is turned...

Yahoo Message Number: 21415
Larry, I have the same setup and the light does not come on when the key is turned. I assume this is because the jake brake turns itself off at about 5mph, even when the rocker switch is turned on. In fact, it's the only warning light that doesn't come on for an instant when the key is turned on.

Walt Rothermel

03Allure30811 ( for sale )

Re: Does EXHUAST BRAKE lite come on when key is turned...

Reply #1 –
Yahoo Message Number: 21418
Great! Thanks Walt! That helps alot!

Larry

Re: Does EXHUAST BRAKE lite come on when key is turned...

Reply #2 –
Yahoo Message Number: 21426
I agree with Walt's comment regarding the Jake Brake light. In fact, when I am slowing down with the Jake Brake engaged the light goes out at about 5 mph.
Also, it does not come on when the key is turned on prior to engine start.

Chuck Penque

03 Intrigue 11673

Re: Does EXHUAST BRAKE lite come on when key is turned...

Reply #3 –
Yahoo Message Number: 21433
Thanks Chuck. This is good info to know when I go back and do some more troubleshooting. Just for anyone's memory bank, mine cuts off at 15mph. Thanks again.

Larry, 30856

Does EXHUAST BRAKE lite come on when key is turned...

Reply #4 –
Yahoo Message Number: 21451
If your exhaust brake is PAC brake, it is probably like mine.
In my coach pac brake is an exhaust restricting valve, valve actuator cylinder & solenoid valve to power the air cylinder. No pac electronics or switch. All controls are in Allison & Cat programs. The Allison electrically powers the pac solenoid valve. Pac light on dash is parallel to solenoid valve. If pac action does not correspond to pac dash light, your have a problem in mechanical parts or wire to solenoid valve. My C9 Cat has user program parameters for pac brake action. My minimal understanding is the Allison has final control so that brake can't damage Allison.

My C9 program has been changed to "pre-select" second gear, engage pac @ 10 M/H over cruise speed, engage pac when throttle closes & ignore service brake.

If your pac brake has a pac control module, it is an added unit, probably dealer installed.

Eric Lee Elliott
5 CC Inspire 51321

Re: Does EXHUAST BRAKE lite come on when key is turned...

Reply #5 –
Yahoo Message Number: 21462
Thanks Eric, but I should have previously mentioned that I have a Jake Brake.

Larry, #30856

Quote from: Eric Lee Elliott\[br\
] >

If your exhaust brake is PAC brake, it is probably like mine.
In my coach pac brake is an exhaust restricting valve, valve

actuator

Quote
cylinder & solenoid valve to power the air cylinder. No pac

electronics

Quote
or switch. All controls are in Allison & Cat programs. The

Allison

Quote
electrically powers the pac solenoid valve. Pac light on dash is > parallel to solenoid valve. If pac action does not correspond to

pac

Quote
dash light, your have a problem in mechanical parts or wire to

solenoid

Quote
valve. My C9 Cat has user program parameters for pac brake

action. My

Quote
minimal understanding is the Allison has final control so that

brake

Quote
can't damage Allison.

My C9 program has been changed to "pre-select" second gear, engage

pac @