Seth Howard
New member
any idea what would be causing the fuse to blow?? Even after it blows as soon as I replace it it blows again without ignition being on or anything!! ??
Thanks
Thanks
TJ keeps blowing ASD fuse
- Thread starter Seth Howard
- Start date
greg92jeepxj
Official Supporter
Hey buddy ! Welcome to the forum ! Just noticed your post and started a little research .
I only have so much in the way of service manual pertaining to your vehicle , but this problem is relevant to systems used in older and newer vehicles like yours . The ASD , auto shutdown relay and fuse control several systems . First of all , each fuse you install blows immediately tells you something very basic and an age old problem ; SHORT TO GROUND. If you can get your hands on a wiring diagram for your vehicle , it would help you tremendously . But at least you can begin inspecting wiring on the following system's wiring harness : fuel injection , ignition , O2 sensor , electric fuel pump . The computer shuts these down to stop engine to prevent engine damage when something like oil pressure or water temperature for instance is at a dangerous level that can cause irreversible damage to your engine ( maybe transmission too ) . Does this mean you will have to tear into EVERY wire under the hood and on or in the truck body ? No , but hopefully not too many or too far into . Start with the O2 wires as they hang in the breeze and are always next to hot exhaust . You start to understand how this happens knowing wires are next to hot exhaust . Fuel injector harness on t the motor can be vulnerable when heat under the hood bakes the insulation after serving your truck years after year . A valve cover job or lash adjustment is performed next to these wires too . I can go on , but you get the point . Maybe following a wiring schematics is not fun , but if you can get one for this system , it will help you immensely.
Try the service and parts department at a local jeep dealer . They should be able to furnish you with copies of the pages . Just tell them of the fuse your truck keeps blowing to give them an idea of what you need . You may get lucky and find it right away . It may be as easy as crawling under the truck to peek up at the O2 sensor wiring . Hope this helps you and gives you a god place to start . Whatever you find in your inspection , post back if you need assistance .
while I got experience on my own vehicle(s) , there are many members who vastly are superior to myself in knowledge and skills . Some may be pro techs or shop owners . Others are just more familiar with many off road vehicles through personal ownership or members of local off road clubs. You've come to the right place , there's people at Jeepz.com who can help .
Great people , always willing to help . I'm new , try to do my part to . Greg92jeepxj
I only have so much in the way of service manual pertaining to your vehicle , but this problem is relevant to systems used in older and newer vehicles like yours . The ASD , auto shutdown relay and fuse control several systems . First of all , each fuse you install blows immediately tells you something very basic and an age old problem ; SHORT TO GROUND. If you can get your hands on a wiring diagram for your vehicle , it would help you tremendously . But at least you can begin inspecting wiring on the following system's wiring harness : fuel injection , ignition , O2 sensor , electric fuel pump . The computer shuts these down to stop engine to prevent engine damage when something like oil pressure or water temperature for instance is at a dangerous level that can cause irreversible damage to your engine ( maybe transmission too ) . Does this mean you will have to tear into EVERY wire under the hood and on or in the truck body ? No , but hopefully not too many or too far into . Start with the O2 wires as they hang in the breeze and are always next to hot exhaust . You start to understand how this happens knowing wires are next to hot exhaust . Fuel injector harness on t the motor can be vulnerable when heat under the hood bakes the insulation after serving your truck years after year . A valve cover job or lash adjustment is performed next to these wires too . I can go on , but you get the point . Maybe following a wiring schematics is not fun , but if you can get one for this system , it will help you immensely.
Try the service and parts department at a local jeep dealer . They should be able to furnish you with copies of the pages . Just tell them of the fuse your truck keeps blowing to give them an idea of what you need . You may get lucky and find it right away . It may be as easy as crawling under the truck to peek up at the O2 sensor wiring . Hope this helps you and gives you a god place to start . Whatever you find in your inspection , post back if you need assistance .
while I got experience on my own vehicle(s) , there are many members who vastly are superior to myself in knowledge and skills . Some may be pro techs or shop owners . Others are just more familiar with many off road vehicles through personal ownership or members of local off road clubs. You've come to the right place , there's people at Jeepz.com who can help .
Great people , always willing to help . I'm new , try to do my part to . Greg92jeepxj
Seth Howard
New member
I got the wiring harness and started just messing around with the wires and its running fine now so if it shorts out again I know where to start!! LOL thanks!
greg92jeepxj
Official Supporter
Glad to hear that . Hope all continues to work out fine . Yeah , just keep an eye on the wiring harness for bad wires and repair as necessary to keep the gremlins away . Than,s for your reply and best of luck ! Thank you brother 69jeepcj !
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