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Old 06-21-2010, 01:47 PM   #6
mrein3
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Join Date: Feb 2000
Location: Center City, MN, USA
Posts: 3,254
Re: Blower or Switch? and another AC question or two

What I found when I converted to an AC controller is that the wire must have been a bit undersized from the fractory. ALL the switches and plastic plugs behind the switch that I saw used were melted.

Drop your controller down and remove the switch. Look at the plug. If it is melted just order one of each. If the wires are hosed you can fix those too. Go to Napa and tell them to give you a handfull of part number 725147. These are the female "Packard 56" or "Type 56" connectors. You can repair your wires with them, insert them into that new plug connector. Put the new connector on your new switch then look at the relay.

For the heater control valve under the hood, it cuts off the flow of coolant to the heater core when the AC is on. If you can't afford or find a new one just put a ball valve in there. Open it in the winter and close it in the summer. The factory style one which is re-popped is a better way to go.
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'70 cab, '71 chassis, 383, TH350, NP205.
'71 Malibu convertible
'72 Malibu hard top
Center City, MN
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