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Jake Brake Intermittent ?

Yahoo Message Number: 17124
I have the ISL 370 with the Jake Brake. Sometimes when I release the throttle, the Brake does not engage. Silverleaf shows that the transmission drops to 4th gear, but the red light may not illuminate.
It also reports the following fault: "ENG PID 121 4 Engine Retarder Status Low Voltage" If I "work" the throttle a bit, the brake may kick in. This is verified by the red light and the corresponding/added drag on the engine. I don't have a schematic of the system and was wondering if anyone does and can tell me what wire(s)I need to chase down to try and fix it. Any insight is appreciated. Thanks.

Larry, Debbie, Tiki and Tomi (Pugs) USAF Retired

2003 36' Allure #30856

Re: Jake Brake Intermittent ?

Reply #1 –
Yahoo Message Number: 17127
Larry,

I had to replace the Jake brake on/off switch and also the diodes at the switch. You should have a circuit diagram with your coach that show the wiring of the switches. Ours was also intermittent, and on one trip stopped working. A new switch and the diodes cleared up the problem.

Per

95 Affinity

Re: Jake Brake Intermittent ?

Reply #2 –
Yahoo Message Number: 17136
Thanks Per! I'll look into that. For some reson my book doesn't have that digram. I would think that the switch would be at the engine, not at the pedel?

Larry

Quote from: Per Korslund\[br\
]
Larry,

I had to replace the Jake brake on/off switch and also the diodes
at the switch. You should have a circuit diagram with your coach that show the wiring of the switches. Ours was also intermittent, and on one trip stopped working. A new switch and the diodes cleared up the problem.

Quote
Per

95 Affinity

Larry Feather wrote:

I have the ISL 370 with the Jake Brake. Sometimes when I release

the

Quote
throttle, the Brake does not engage. Silverleaf shows that the > transmission drops to 4th gear, but the red light may not

illuminate.

Quote
It also reports the following fault: "ENG PID 121 4 Engine

Retarder

Quote
Status Low Voltage" If I "work" the throttle a bit, the brake may

kick

Quote
in. This is verified by the red light and the corresponding/added

drag

Quote
on the engine. I don't have a schematic of the system and was

wondering

Quote
if anyone does and can tell me what wire(s)I need to chase down to

try

Quote
and fix it. Any insight is appreciated. Thanks.

Larry, Debbie, Tiki and Tomi (Pugs) > USAF Retired

2003 36' Allure #30856

To visit your group on the web, go to: >
">Country-Coach-Owners-unsubscribe@yahoogroups.com >

Re: Jake Brake Intermittent ?

Reply #3 –
Yahoo Message Number: 17142
Larry,

The switches I'm talking about are the actuating switches on the driver's side panel. I have the older style toggle switches, and when I started having problems, I figured they would be easy and cheap to replace. I've already had to replace a couple of the other switches, so that is the first place I looked. Since it worked, I didn't have to go farther!

Per

Re: Jake Brake Intermittent ?

Reply #4 –
Yahoo Message Number: 17146
Oh Yes! I did think about that after my reply to you. That part should be easy! Just wondering, if I may ask, where did you find the diodes? Thanks

Larry

Quote from: Per Korslund\[br\
]
Larry,

The switches I'm talking about are the actuating switches on the
driver's side panel. I have the older style toggle switches, and when I started having problems, I figured they would be easy and cheap to replace. I've already had to replace a couple of the other switches, so that is the first place I looked. Since it worked, I didn't have to go farther!

Quote
Per

Larry Feather wrote:

Thanks Per! I'll look into that. For some reson my book doesn't > have that digram. I would think that the switch would be at the > engine, not at the pedel?

Larry

[quote author=Per Korslund

> Larry,
>

> I had to replace the Jake brake on/off switch and also the

diodes

Quote
at the switch. You should have a circuit diagram with your coach > that show the wiring of the switches. Ours was also intermittent, > and on one trip stopped working. A new switch and the diodes > cleared up the problem.
>
> Per

> 95 Affinity
>

> Larry Feather wrote:

> I have the ISL 370 with the Jake Brake. Sometimes when I

release

Quote
the

> throttle, the Brake does not engage. Silverleaf shows that the > > transmission drops to 4th gear, but the red light may not > illuminate.

> It also reports the following fault: "ENG PID 121 4 Engine > Retarder

> Status Low Voltage" If I "work" the throttle a bit, the brake

may

Quote
kick

> in. This is verified by the red light and the
corresponding/added

Quote
drag

> on the engine. I don't have a schematic of the system and was > wondering

> if anyone does and can tell me what wire(s)I need to chase down

to

Quote
try

> and fix it. Any insight is appreciated. Thanks.
>

> Larry, Debbie, Tiki and Tomi (Pugs) > > USAF Retired

> 2003 36' Allure #30856
>
>
>
>
>
>
>

> To visit your group on the web, go to: > >
>

> ">Country-Coach-Owners-unsubscribe@yahoogroups.com > >
>

To visit your group on the web, go to: >
">Country-Coach-Owners-unsubscribe@yahoogroups.com >

Re: Jake Brake Intermittent ?

Reply #5 –
Yahoo Message Number: 17148
I used diodes I found at my local Radio Shack, although they were slightly smaller than the original ones. They seem to work OK, and I carry a few spares just in case. So far, so good!

Per