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Old 01-18-2006, 02:46 AM   #5
71/454
Turbo Guy
 
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Join Date: Jan 2005
Location: Calgary Alberta
Posts: 353
Re: How do you tell if a Brake Combination Valve is Defective?

Like i said it didn't work for me but u might as well try it. Sit in the truck with the engine off apply the brake fairly firm and then start the truck, if it is working properly the pedal should drop when the engine starts. I'm not sure this is an official troubleshooting method, I learned it as one of those "grandfather" teachings in a shop I used to work at.
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