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Old 08-18-2014, 01:25 PM   #1
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Join Date: Jul 2014
Posts: 16
Not in Park Brake Light

2012 Tiffin Phaeton with Freightliner Chassis experiencing an intermittent "Not in Park/Brake" light illumination on LH Driver console. The light doesn't illuminate when starting up the coach. After 20 or so miles the light will appear. When I stop, and start the coach again the light remains off until I go several miles down the road.

The main brake light is not illuminated nor are there any alarms sounding.

Anyone else experience a similar problem?

I thought it might be a grounding problem but I don't have any idea where to even begin checking.

2012 Tiffin Phaeton
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Old 08-19-2014, 04:46 PM   #2
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Join Date: Aug 2014
Posts: 608
Most air brake systems use pancake air pressure switches. They will look something like this Truck Trailer Spring Brake Light Switch Low Air Keep in mind they come in different pressures and do different things but you likely have several in your braking system. One issue I have seen many times over the years is they get covered with crude and short out across the tops of the terminals. Often when driving in the rain. I take some cleaner like brake cleaner and clean them then spray a coat of sealer over them. Like I said there are likely several on your air system so it can take a while to find out which one is the problem.

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Old 09-05-2014, 06:38 PM   #3
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Join Date: Jul 2014
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HWH response

Replaced touch pad at a cost of $158 dollars and it appears to have resolved my issues. Final test tomorrow but preliminary indications this was the culprit.

If not, HWH stated the control module mounted on the valves would require replacement.
2012 Tiffin Phaeton
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Old 10-04-2014, 06:54 PM   #4
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Not in Park/Brake Resolution

The replacement of the HWH touch pad resolved our light problem.
2012 Tiffin Phaeton
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