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kuehl kuehl is offline
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Join Date: Aug 2004
Location: Stuck in NJ
Posts: 3,271
Garage
Andy,

1) Check fuse on in front trunk on fuse panel, AND check the wire leading out for corrosion

Ign key on accessory position:
2) Relay in smugglers box, check for power to terminal 30, then check for power
coming out of 87, if all that is good:

3) Locate power wire to evap blower motor, disconnect, check for power in the power connector going to the blower motor (females spades on molex connector); red wire; check all 3 fan speeds. If you have power it's the evap blower motor, if you don't have power:

4) Under the RH passg foot board, remove board, locate the black plastic trapezoid, there is fan speed control (spring resistors and overheating point set).
Unplug the square black electrical plug. Inside there round pins and wire colors are typically Red/Green for low speed, Red/Black for medium speed, Red White for full fan speed. Check each wire's plug connector. If no power at any or few its the fan speed switch; Pelican sells it 911-613-243-00. If you are getting power at the plug check the thermal "point set" to see if contacts are making or open.
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Kuehl
1987 911 cab, modified
https://griffiths.com/
Old 05-24-2016, 02:49 PM
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