Installed new battery, then...

[klbastian7]

I have a 2018 Wrangler JL, 2.0 L engine. Recently the main battery died and I replaced it. I was also going to replace the aux battery but discovered it had already been removed (bought the Jeep used). Anyway, new battery in place, the vehicle started right up, but now I have a Power Steering Service fault and there is no power steering, although it can be steered, just that now the human supplies the power. Anyway, after all this, I lifted the negative battery cable and let it off for several hours in the hope that all the electronic gizmos would reset. But alas, it did not happen. I've read of some similar things in this forum, but haven't noticed a real solution yet. Would appreciate some thoughts on the issue.

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[CaJLMetalHead]

I have a 2018 Wrangler JL, 2.0 L engine. Recently the main battery died and I replaced it. I was also going to replace the aux battery but discovered it had already been removed (bought the Jeep used). Anyway, new battery in place, the vehicle started right up, but now I have a Power Steering Service fault and there is no power steering, although it can be steered, just that now the human supplies the power. Anyway, after all this, I lifted the negative battery cable and let it off for several hours in the hope that all the electronic gizmos would reset. But alas, it did not happen. I've read of some similar things in this forum, but haven't noticed a real solution yet. Would appreciate some thoughts on the issue.

ugh... mine is a 2018... but 3.6L .. no idea if your steering system is the same as mine.... but I imagine yours has the aluminum steering box and the electric pump?... I wonder if the pump died... no idea if it can be diagnosed.. I will look into my service manual later tomorrow and I will let you know!

 

[Yawnie'sPapa]

I have a 2018 Wrangler JL, 2.0 L engine. Recently the main battery died and I replaced it. I was also going to replace the aux battery but discovered it had already been removed (bought the Jeep used). Anyway, new battery in place, the vehicle started right up, but now I have a Power Steering Service fault and there is no power steering, although it can be steered, just that now the human supplies the power. Anyway, after all this, I lifted the negative battery cable and let it off for several hours in the hope that all the electronic gizmos would reset. But alas, it did not happen. I've read of some similar things in this forum, but haven't noticed a real solution yet. Would appreciate some thoughts on the issue.

Bet the high current fuse is blown.
All of these are EHPS - electro-hydraulic power steering and get power through the high current fuse on the end of the PDC.
More than one person has blown a part of that fuse when swapping batteries.
Check the fuse map in the cover of your PDC.
See that you have power to N6 stud.
The high current fuse array is basically what all of those studs are about on the end of the PDC.

 

[klbastian7]

I suppose it could have been fried while replacing the battery, although that would be a bit or a coincidence. But I've been seeing threads where folks had all sorts of electrical issues after changing out a battery.

 

[klbastian7]

Bet the high current fuse is blown.
All of these are EHPS - electro-hydraulic power steering and get power through the high current fuse on the end of the PDC.
More than one person has blown a part of that fuse when swapping batteries.
Check the fuse map in the cover of your PDC.
See that you have power to N6 stud.
The high current fuse array is basically what all of those studs are about on the end of the PDC.

Just checked the N6 post. I have 10+ volts on it, without the Jeep running. What should I expect?

 

[Fudster]

Just checked the N6 post. I have 10+ volts on it, without the Jeep running. What should I expect?

Keith:

If I'm not mistaken, testing the high amp fuses is done by setting a multimeter to its continuity setting and simple testing if a fuse has continuity: i.e. hasn't been blown.

The fact that you are detecting voltage on it though is probably a good sign that it is not blown and that cause for your power steering failure may lie elsewhere.

 

[gm920]

It should be reading the same as your battery voltage.

 

[klbastian7]

Bet the high current fuse is blown.
All of these are EHPS - electro-hydraulic power steering and get power through the high current fuse on the end of the PDC.
More than one person has blown a part of that fuse when swapping batteries.
Check the fuse map in the cover of your PDC.
See that you have power to N6 stud.
The high current fuse array is basically what all of those studs are about on the end of the PDC.

You were right. I replaced the high current fuse array as you suggested. Success! Thanks. Next time I'll remember to be more careful when changing the battery and handling the leads.

 

[Yawnie'sPapa]

It should be reading the same as your battery voltage.

Yes, exactly, because it has near 0 resistance.
A lower voltage is because it's feeding back through the EHPS pump to the fuse, not from the battery through the fuse.
I should have added that when I posted. I guess I "assumed". But that's what forums are all about - someone fills in missing information.

 

[Yawnie'sPapa]

You were right. I replaced the high current fuse array as you suggested. Success! Thanks. Next time I'll remember to be more careful when changing the battery and handling the leads.

You are in a club with a number of members, I'm sure. Even after decades in the field with too much experience, I've had a boo-boo or three LOL

The positive side of it is - you will not soon forget. Next battery replacement, it won't happen to you.

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