AC controls vacuum loss

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Ram_Jam_98

Junior Member
Joined
Mar 2, 2021
Posts
1
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0
Location
St Petersburg, FL
Ram Year
1998
Engine
5.2
My 1999 Ram 1500 loses vacuum to the AC controls when I press the power brakes. I checked for vacuum leaks in the hose to the power brake booster and the hoses to the AC controls. No leaks. Checked entire engine for vacuum leaks also. No leaks. When this occurs I can turn the AC off and once going down the road again turn the AC back on and it blows cold.

Any ideas on what I should check?

Thanks,
Mark
 
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