PVHLS - Keeps going bad????
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Freshman User
Joined: Dec 2010
Posts: 31
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From: PA
PVHLS - Keeps going bad????
Pulse Vacum Hub Lock Solenoid (PVHLS) keeps going bad on my 2000 f250 7.3L. The way I know the PVHLS goes bad is by the heater control defaults to defrost no matter where I have the **** set at. I havent been able to find any air leaks in the hoses. I looked behind the glove capartment and still didn't find any air leaks. My next theory is that the O-rings are leaking in the hubs. My auto hub locks dont work either. I have to get out and lock in the hubs every time. The O-rings that I am thinking are bad are the ones located on the Hub Lock that comes out by sqeezing the retainer ring with a pair of pliars. Any input will be greatly appreciated. Thank You!!!
Lead Driver
Joined: Jan 2007
Posts: 6,708
Likes: 5
From: Kiowa CO
The hub o-rings that most likely are leaking are the yellow ones on the backside of the wheel hub, not the lockouts. Look at this write-up. Welcome to guzzle's 4x4 Needle Bearing Maintenance Web Page
Hook it, I'll pull it.
Joined: May 2007
Posts: 15,037
Likes: 4
From: Grand Lake, La.
Pulse Vacum Hub Lock Solenoid (PVHLS) keeps going bad on my 2000 f250 7.3L. The way I know the PVHLS goes bad is by the heater control defaults to defrost no matter where I have the **** set at. I havent been able to find any air leaks in the hoses. I looked behind the glove capartment and still didn't find any air leaks. My next theory is that the O-rings are leaking in the hubs. My auto hub locks dont work either. I have to get out and lock in the hubs every time. The O-rings that I am thinking are bad are the ones located on the Hub Lock that comes out by sqeezing the retainer ring with a pair of pliars. Any input will be greatly appreciated. Thank You!!!
