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So I bought this 2001 ranger 2 weeks ago! The heater wasn’t working but you can hear the ax compressor click but no air in vents. So I pulled the fan put new resistor in and bench test fan fan worked. Put new relay in still no fan. Checking fuses fuse on side of dash had a melted slot #2 so pulled the fuse panel to get a better look and found 2 wires taped up see pictures. Wires look to have gotten hit and melted some.
Question what options do I have to fix this? I would like to have the defrost to work.
Purple/orange and black/green wires are part of cab fuse #2
The out voltage to devices
Only a 10amp fuse so should have blown well before wire melted
Could previous owner have put in a higher amp fuse?
These wires have no connection to heat/AC system or blower motor, so separate issue
Those 2 wires need key on 12v via a 10amp fuse, diagrams below, these 2 wires are seen on diagram 3, vio/org = purple/orange, lol
But one or both may be shorted to ground, need to test for that with OHM reader
You may need to cut the wires shorter and splice in longer wires to add your own in-line 10amp fuse, if fuse box is too damaged to repin fuse #2
Or replace fuse box
If you have an automatic trans then the purple/orange wire can short where it runs into the shifter arm on steering column
Its the TCS wire, transmission control switch, i.e. OD on/off button
Wire can chaff and short to the metal arm
There is a 2 wire plug-in in the steering column, you can unplug it and see if short goes away
Won't effect driving, OD is reset to ON each time you start the vehicle
Blower motors are controlled by GROUNDING, in pretty much all vehicles, not a Ford thing
The Blower motor relay sends 12volts directly to blower motor when activated
The Speed Control is the GROUND for the blower motor
HIGH speed is a direct Ground, by passing the Resistor block
Lower speeds go thru resistors , 1, 2 or 3 resistors in the resistor block, the more resistors the lower the speed
Test if motor has 12volt from relay with key on/engine off, climate control on any setting but off
If so then you have a ground issue, either in the cab at the speed control or in the engine bay at resistor block
