Question about 1997 Jeep Grand Cherokee
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.
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.
Posted on Oct 04, 2009
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Posted on Jan 02, 2017
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