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Showing results for tags 'ac vacuum'.
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i got my ac working again the other day but the controls are stuck in the defrost mode. I know the controls need vacuum to operate and all my other accessories work, 4wd and the exhaust brake. I have vacuum where the line goes thru the firewall at the evaporator. A good while back when I replaced the evaporator I noticed the hard line going thru the fire wall had cracked and I replaced a section with vacuum hose and have vacuum to that point. I figure while installing the new drier or high pressure line I most likely fractured the hard line going thru the fire wall. Does this hard line go straight to the multi point connector for the controls? I could not quite contort myself enough to check for vacuum at that point. My thought is just to run some new line thru the firewall and to that connector. It seems to me that should work as long as that line is not connected to something else before the multi point connector.
