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Bobhoy · 07-13-2017, 08:47 AM

On my 2001 Affinity I can't figure out how to turn on the jake break. It ha high low and med and then there is a switch that has a 'M' on it...looked at manuals and can't figure out what the 'M' is for? Does that turn on the brake? I don't think my brake is working since I can't hears it or feel it slow down the engine . Thanks

Affinityfan · 07-13-2017, 09:28 AM

Quote:

Originally Posted by Bobhoy

On my 2001 Affinity I can't figure out how to turn on the jake break. It ha high low and med and then there is a switch that has a 'M' on it...looked at manuals and can't figure out what the 'M' is for? Does that turn on the brake? I don't think my brake is working since I can't hears it or feel it slow down the engine . Thanks

Send pics of panel switches.

Bigbluedog55 · 07-13-2017, 11:46 AM

On my 2001 Affinity, the "M" switch is the one for the Jake. If it is working, the transmission will down shift to 4th gear and you will hear the rumble of the brake.

Luck,

Bob

1doodadd · 07-13-2017, 11:54 AM

Is your cruse control on? Will not work in cruse is on.

CarlAda · 07-13-2017, 12:12 PM

Quote:

Originally Posted by 1doodadd

Is your cruse control on? Will not work in cruse is on.

Yes, it will.

Smitty77 · 07-13-2017, 12:14 PM

Quote:

Originally Posted by 1doodadd

Is your cruse control on? Will not work in cruse is on.

This is so with many coaches and chassis. However I believe (Know on my 04 Allure with ISL.) that if you have the Jake Switch On, and then tap the Brakes, the Jake will activate. (And of course, at the same time 'de-activate' the cruise.).

Also, some (Know my coach can.) also be set to have the Jake come on to maintain set speed. Their is a setting in the Parameters to turn this feature on, as well as to set the "Cruise Control Speed Delta for Minimum Engine Brake - Parameter" and also "Maximum" Delta too. (Default on my coach was 2mph and 4mph respectively. I had these changed to 1mph (Minimum Delta) and 3mph (Maximum Delta).

All of the above is specifically for Jake Compression Brake, admit I do not know how Pac or Exhausts Brakes settings work

!

And a final caution, not sure what happens with the Bigger Block 3 Stage Compression brakes - if they have settings for each of the stages or not(?).

One thing I'm still trying to validate, and actually sitting in the Cummins ABQ, NM waiting room now - is if they can change my Jake On default gear to 5th from 4th. (Have read conflicting info on this, suspect due to the many years of ISL being around

!).

Best to all,
Smitty

CarlAda · 07-13-2017, 01:03 PM

If I have my cruise control set and my jake brake is activated and I'm going downhill, the jake brake will come on as speed increases. I do not have to tap my brakes to activate it. Since I travel a lot on the passes of Oregon, I've come to rely on my jake a lot. I rarely use my brakes going downhill, relying on the jake brake and selecting a good gear to control my speeds.

Bobhoy....set your jake to high, activate it, then take your coach up to speed, remove your foot from the gas pedal. You should feel the jake activate and probably hear it, as well.

1doodadd · 07-14-2017, 07:48 AM

On my 2000 Beaver Marquis I have the Smart wheel with controls on it. Same as on my 2006 Kenworth T800 Lowbed Tractor, Jake will not work even with cruse in neutral, it must be off. Cruse Must be Off in my application.

Bluefoot53 · 07-14-2017, 10:01 AM

When we purchased our 2001 Intrigue I couldn't get the Jake to work. I finally figured out that the idle control was set up a little. Turned the idle down and the Jake works. It is a ISL motor and want to get it reprogamed so it won't shift down to 4th when it comes on.