15961566 - Switch Asm - Park Brake Pump ( AKA Rotten Green Switch or RGS)

15961566  -  Switch Asm - Park Brake Pump ( AKA Rotten Green Switch or RGS)


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Most orders are shipped within 24 hours from the order date. Orders placed on the weekend or after cutoff on Friday, and orders placed on select holidays are processed on the next business day. Please see our shipping terms for more information.


The infamous rotten green switch for the P32 J71 Auto Park Brake. These are a high failure rate part. We strongly recommend ordering our high quality, lifetime guaranteed pressure switch US21P or the set of switches US21 or US22.

I have a Winnebago adventurer on a P-30 chasis. Two weeks ago after driving over a mountain and within 10 feet of our back-in spot the auto brake came on while still in drive. After pushing and releasing the foot park brake it did release and I was able to put in reverse. I paid the $525 to have it towed home. I very good mechanic checked it out and said he could not find an issue. I think the GM 15961566 is the problem what do you think ?
( Miles E Burger, 04/15/2021 )
Usually the pressure  switch fails by leaking all the fluid out or cycling the pump/ and or turning the warning light on , what year is your chassis ? , the earlier models have a switch at the base of the steering column than can fail and cause issues with reverse . ( Support )
What happens if this switch fails. My auto park does not engage, rv rolls freely though auto park light is on. ( Stanley M Turnbull, 07/19/2018 )
The brake will default to the applied position if switch fails. This in turn will burn the brake up and then cause the coach not to hold. You would want to replace the factory switches with our high quality set, part # US21 for starters. You will need to replace the brake shoes at minimum but may need other parts depending on severity of damage. ( Support )

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 The state of California requires that this warning be posted for people purchasing products that reside in California.

WARNING: Products may contain one or more chemicals known in the State of California to cause cancer and/or birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov

VIN Verification Service Item

This product allows for a VIN verification service.

  • This is a service that we provide free of charge when a part is purchased.
  • When you provide your VIN below we will personally verify your part selection by your VIN before shipment of your order.
  • This helps ensure that this is the correct part for your vehicle.
  • This is not an automatic VIN check, it is done by a parts specialist once order is placed.
  • We can only VIN verify vehicles back to model year 1996, if older we can help but can't guarantee fitment.
  • If you would like to have your part selection verified before purchase please call or email us.

Shipping Insurance Notice

NOTICE: For orders outside of United States

If you are placing an order to ship outside the United States, Shipping Insurance will be required and added automatically at checkout.


  • $152.81
  • $113.19

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