Intermittent ASD 20Amp fuse blowing
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Joined: Apr 2015
Posts: 224
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From: Lhasa, Tibet
Year: 1997
Model: Cherokee
Engine: 4.0 inline 6
1997 xj, stock, straight 6 aw4
Seems to happen more under load/heat. The 20amp fuse in power control block (labelled 10 by jeep manual, but seems to be 11 in most wiring diagrams) labelled "Automatic shut down engine control" in manual. Once it starts blowing, it will keep blowing until car rests.
Seems to happen more under load/heat. The 20amp fuse in power control block (labelled 10 by jeep manual, but seems to be 11 in most wiring diagrams) labelled "Automatic shut down engine control" in manual. Once it starts blowing, it will keep blowing until car rests.
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Joined: Jul 2012
Posts: 793
Likes: 104
From: Aldie, VA
Year: 1999
Model: Cherokee
Engine: 4.0
I had this happen on my 99 after an alternator replacement. If the engine revved over 4k or so, the ASD fuse would blow. Got a replacement alternator and the problem went away. I didn't diagnose it much once I figured out the high RPMs and replacement alternator were causing it. I know the voltage regulator is in the ECU on these, but it was definitely the alternator.
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