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PDC Fuse F18 keeps blowing

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Old Sep 8, 2012 | 07:00 PM
  #1  
Sammy60's Avatar
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From: upstate new york
Year: 1996
Model: Cherokee
Engine: 4.0
Default PDC Fuse F18 keeps blowing

1996 Jeep Cherokee SE 4.0L
When my jeep heats up for awhile, if I turn it off, when I start it again the check engine light comes on and a 15 amp mini blade fuse in the PDC blows. Also happens when I'm driving for awhile. I looked in my manual and it shows a completely different PDC, looked online but still have no idea what the fuse even does. According to the diagrams I saw it's F18 and controls ASD Coil. But my jeep starts and runs, although it stalls occassionally, so how could it be. If I could find out what the fuse does, I'd have a place to start.
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Old Sep 8, 2012 | 08:12 PM
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'96 PDC...(and 96 doesn't match earlier or later years)
Attached Thumbnails PDC Fuse F18 keeps blowing-96-xj-pdc-drawing.jpg  

Last edited by Radi; Sep 8, 2012 at 11:59 PM.
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Old Sep 8, 2012 | 08:17 PM
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Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
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which fuse
Attached Thumbnails PDC Fuse F18 keeps blowing-84009438.jpg   PDC Fuse F18 keeps blowing-p1010156.jpg  
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Old Sep 8, 2012 | 08:27 PM
  #4  
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I have 97 PD. does it look like yours?
Attached Thumbnails PDC Fuse F18 keeps blowing-jeepc97-pdc-diagr.jpg  
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Old Sep 8, 2012 | 08:37 PM
  #5  
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Year: 1989 xj sport 2dr
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ops not even here guys
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Old Sep 8, 2012 | 09:13 PM
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Hi,
Thanks freegdr, I only have dial up internet service up here, so it's a real pain.
The second picture the top right blue 15 amp fuse, right below the relays.
1 up and 1 over from the one circled.

Last edited by Sammy60; Sep 8, 2012 at 09:22 PM. Reason: more info
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Old Sep 8, 2012 | 09:18 PM
  #7  
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Thanks car5car but mine is different.
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Old Sep 8, 2012 | 10:08 PM
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This Fuse please. What does it do? (15amp mini blade fuse)

PDC Fuse F18 keeps blowing-copy-p1010156.jpg
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Old Sep 8, 2012 | 11:25 PM
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Edit: what code are you getting with the CEL?

Last edited by Radi; Sep 9, 2012 at 12:03 AM.
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Old Sep 9, 2012 | 07:19 AM
  #10  
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Code 31 when i turn the key on and off four times. I can't get my friends OBD2 scanner to link to jeep.
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Old Sep 9, 2012 | 09:12 PM
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Year: 1997
Model: Grand Cherokee
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Fuse 18 in the PDC powers low washer fluid level switch, backup lamp switch MT only, evap/purge solenoid, park/neutral position switch 4.0L and AT only, ac clutch relay and radiator fan relay.

This is the wiring for a 96 Jeep Cherokee SE 4.0L

That code 31 I believe has to do with the evap/purge solenoid.
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Old Sep 9, 2012 | 10:27 PM
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Thanks everyone. I pulled the pdc and the first thing I saw were wires that finally matched a diagram I had.
Althought it's listed as a an ASD fuse, it actually is the evaporation purge solenoid fuse. Thanks ET JEEP. By the way the ASD fuse is #20.
I appreciate all the help and will let you know how it turns out.
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Old Jun 4, 2015 | 08:33 PM
  #13  
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Originally Posted by Sammy60
Thanks everyone. I pulled the pdc and the first thing I saw were wires that finally matched a diagram I had.
Althought it's listed as a an ASD fuse, it actually is the evaporation purge solenoid fuse. Thanks ET JEEP. By the way the ASD fuse is #20.
I appreciate all the help and will let you know how it turns out.
So what did you fix to get it to stop blowing I am currently having this issue
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