Jeep Electrical Issue, help?

[cavemann]

Are you throwing codes?  OBDII reader?
P0336  Crankshaft Position (CKP) Sensor Signal  Problem with voltage signal from CKP
P0387  Crankshaft Position Sensor Supply Voltage Too Low  CKP sensor voltage input below the minimum acceptable voltage.
P0388  Crankshaft Position Sensor Supply Voltage Too High


https://www.quadratec.com/jeep_knowledgebase/article-39.htm

trying to track one down without buying one..  but might be time to just get one.  Can't get it to store/shop for reading

[Buckmark]

If the battery has been disconnected (you just replaced it correct, or disconnected it changing the alternator) then codes if any will be cleared

[jackelope]

Yes it would, it kills spark and injector pulse when they die. You will also not see the tach(if it has one) move while cranking. The fact that none of your gauges move KOEO is a little odd to me but crank sensor is very common.

Extra points for fancy acronyms.

[jackelope]

You guys crack me up...  For what its worth, the motor cover says 2.4L..  My 2004 I had years ago was 2.4 and below are some specs.  I'm just going off of that.  Tried spare key and original and yes both are bare metal no chip keys.  In fairness, yes I'm coming to HW for help and by no means a mechanic so deserve all the ribbing!!

So, the new alternator tested bad after trying to get it going.  Neighbor is OK with cars and metered it thinking maybe got a bad one.  O'Reiley's and Pep Boys bench test both said its bad.  Battery tested good but will not take a good charge.  Putting new battery and alternator in again today.  Thinking there is a short or electrical issue frying both??  Funny story, her battery was stolen while she was at work about 9 months ago so it should have been fine.  Had never been run dead.  Alternator was replaced 2 years ago.  Seems odd both could be failing being relatively new.

Grounds at PCM plug tested good, all frame grounds are good after pulling off and I cleaned good anyway.  It's getting fuel.

Alternators are warrantied so money lost there.  Just $150 in with the battery.  It's looking like it might be a lost cause if it gets too involved, not looking to throw a ton of money at it.



2004 Jeep Wrangler SE 2.4L (man. 5) (model since mid-year 2003 for North America U.S.) car specifications & performance data review

Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Jeep Wrangler SE 2.4L (man. 5) in 2004 the model with 2-door sport-utility soft-top body and Line-4 2429 cm3 / 148 cui engine size, 109.5 kW / 149 PS / 147 hp (SAE net) of power, 224 Nm / 165 lb-ft of torque, 5-speed manual powertrain offered since mid-year 2003 for North America U.S.. Specifications listing with the outside and inside dimensions, fuel economy, top speed, performance factory data and ProfessCars™ estimation: this Jeep would accelerate 0-60 mph in 9.8 sec, 0-100 km/h in 10.5 sec and quarter mile time is 17.4 sec.

Apologies from me. It's a 2.4. I think if it was a year older it would have been a 2.5. Maybe 2 years older.
My bad.

[Woodchuck]

Yes it would, it kills spark and injector pulse when they die. You will also not see the tach(if it has one) move while cranking. The fact that none of your gauges move KOEO is a little odd to me but crank sensor is very common.

Extra points for fancy acronyms.

That's why I got the avatar, 

[Buckmark]

Yes it would, it kills spark and injector pulse when they die. You will also not see the tach(if it has one) move while cranking. The fact that none of your gauges move KOEO is a little odd to me but crank sensor is very common.

Extra points for fancy acronyms.

Would of been cooler if he used CKP also 

[Rutnbuxnbulls]

So I'm no mechanic (at all) but my 05 Grand Cherokee had some electrical issues.  I chased it down to a short in the drivers side door wiring harness.  Was able to repair and run a few inches of new cable and it works fine now.  Hope you get it figured out!

[cavemann]

So, it is running...  Crank Sensor was the trick!!  Thanks Woodchuck!!!

[cavemann]

Apologies from me. It's a 2.4. I think if it was a year older it would have been a 2.5. Maybe 2 years older.
My bad.
[/quote]

No apologies needed.  I was ribbing you back.  You guys are awesome, thanks for all the help/suggestions..  And PM's offering help as well.  You know who you are.

[Buckmark]

So, it is running...  Crank Sensor was the trick!!  Thanks Woodchuck!!!

Glad to hear, did the gauges come back alive?

[Woodchuck]

So, it is running...  Crank Sensor was the trick!!  Thanks Woodchuck!!!

Good news.  Giving credit where it is due, The antlered rabbit called it earlier..

[Buckmark]

So, it is running...  Crank Sensor was the trick!!  Thanks Woodchuck!!!

Good news.  Giving credit where it is due, The antlered rabbit called it earlier..

Now his head wont fit through the door... but he did call it early

[cavemann]

yes, gauges and everything all good.

[jackelope]

Together, we can fix anything on the internets.

.

[Jonathan_S]

Guess it was another of those Jeep things that some of us don't understand.

#Toyota