Question about 1997 Jeep Grand Cherokee

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My 1997 jeep grand cherokee keep bruning threw fuse

My 1997 jeep grand cherokee keep bruning threw the automatic shut off fuse and i would like to know if i can disconnect that or how can i fix it.

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  • jhoondee Oct 04, 2009

    can give me some tips how to find out why my fuse keep blowing. can it be that i dont have the remote for the alram and the car is reading as stolen or how can i know if two wire or touching. Can the automatic shut off be disconnected . this is what wrong when i step on by brake it blows the automatic shutoff fuse/relay(20) so i put a thirty(30) fuse in it now when i step on the brake it dnt do that any more but it will still shut off ethier when i drive or when come to a complete stop or just when it want to,

    ok Before with the (20) fuse

    1. stop hard and it will shut off

    2. start driving then it will shut off

    3. slow down it will shut off

    4. when replace on cite it will crank right back up an i drive it to it do it againg.

    ok With the (30) fuse

    1.cut of when it feel like it

    or should i just bring it to a shop.

    THANK FOR YOUR TIME

  • Richard Scordino May 11, 2010

    what engine and transmission are in there? Does it have cruise control?

  • Richard Scordino May 11, 2010

    If you manage to jump out the relay or fuse, whatever is causing it to blow will cause an even larger problem. find the problem.

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  • Jeep Master
  • 6,982 Answers

I've checked three different schematics and came up with three different fuse sizes in that position...15, 20, and 30. So fuse size is questionable but I's stay with 20. The relay serves the fuel system, powering up all injectors. It also triggers the fuel pump relay and is connected to the ignition switch and feeds the main computer at pin#61. I'd be looking first for any wire problems between the fuse and the relay as well as the relay itself The common thread through the situations you listed is that the vehicle is moving, showing the possibility of a wire that is worn through and when the body shifts or vibrates it may be grounding (even standing still running if its close to grounding vibration can intermittently cause contact.) If you need to, remove the power distribution center from the fender and check terminal connections on the underside. repeated shorting will leave a small burn scar, so look on the fender underneath to see if there are any. Sometimes a problem like this will vanish while you are looking for the cause. In that case still try to find the bad wire so you can wrap it, though I've had stuff like that happen and even if not found, it never happened again (likely wire moved far enough away from ground and never touched again)
If you don't find the problem there, you will need to check wiring to all other components I first mentioned. Hopefully, the problem isn't in the computer itself. Likely if you bring it to a good shop, they can identify the problem but tracking down stuff like this takes time, experience and patience and can get expensive, unless they are lucky and find it right away.
On this kind of problem it requires hands on checking that I can't do from here so the best thing I can do is give you the info I'd use to begin looking.
Good Luck!

Posted on Oct 04, 2009

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