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Getting ready to attack the vacum pump in my 02 F350 I have the default defrosters which I have researched to a vacuum problem.
My question is if my electric vacuum pump is not working I pulled hoses off and nothing there is there a different system that assists the breaks?
And the 4x4 selector is it vacuum or electric? I still have 4x4 with manual hubs.
could someone give me a crash course.
Shawn
The brakes are boosted by the power steering pump so no relationship there,sounds like it has ESOF transfercase shift option,so switch on the dash would trigger vacume operated hubs,which sounds like vacume hubs have been removed.
Is the Pump running following startup? If not, the first step is to ensure you have 12vdc at the Two Wire Connector which attaches to the Electric Pump.
If that all checks out (or the Pump activates anyway) use a tool and crimp the vacuum line where it splits off into two and see if the Pump Stops. If so, move to either of the lines after the split. This will isolate which side HVAC/ESOF has the leak. Identify and correct.
I quickly went out to the truck it has 12 V in the plug but the pump does not run with key on or motor running.
so I’m assuming that pump is bad.
Shawn
I quickly went out to the truck it has 12 V in the plug but the pump does not run with key on or motor running.
so I’m assuming that pump is bad.
Shawn
It has good possibilities, the ultimate test of that pump would be to pull the hose off of it that feeds the vacuum tank and see if that makes the pump run with the key on. If it doesn't run you're right on track, if it runs place a finger on that inlet and it should shut off almost instantaneously if it is working correctly.
04-10-2018, 08:01 PM
