Well like the title says my dads truck is only sending vacuum to his brakes his exhaust brake, 4wd, cruise, and vent settings done work is there some thing that would cause this or is it just the vacuum pump going its making 14 pounds or whatever of vacuum on the line going to the master cyclinder.
If oil got in the lines one of them might have swelled shut.
If the truck is '94-'96 there may be a free recall.
Check here, you will need the VIN> Chrysler - Contact Us
Is there any other diagrams for vacuum? like the one for heater controls and transmission. Mine comes off the pump 1/8 hose then goes to a t. It has got to be wrong.
Check valve on the vacuum pump where the main hose connects.
The vacuum system recall was for early 12 valves that didn't have the check valve.
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