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Dead 2006 Wrangler Rubicon

1K views 6 replies 2 participants last post by  spyderpunk 
#1 ·
My Jeep is dead and I need some help to revive. The problem started one fine day when she started to sputter and the speedometer was flipping out - no correlation to actual speed. After a few times stalling and restarting the speedometer went dead but she ran just fine. When home I hooked her up to my Innova 3040c and got a few codes but the first was a CPS. So, I replaced that and and speedo started working but the codes were still in the system so I erased them with the Innova. Now, she is dead and does not even try to turn over. Some clicking and electrical accessories work but nothing else. MIL still lit. Any ideas where to go from here? Innova says nothing is wrong as the DTCs were removed! As POTUS would say; very sad.
 
#2 ·
Welcome to the garage.
Did you check your battery voltage? The clicking noise when trying to start points towards a vibrating starter solenoid, due to a too low voltage. Your battery should have 12.7 V when completely charged, but when at 12.2 V its almost completely discharged.
 
#5 · (Edited)
With the jump box connected, do you have 12.5 V more or less on the jeep? Do you hear/feel the starter relay being activated when trying to start? Its quite s small relay, so it makes only a low clicking noise. If it does, you need to know if you have the battery voltage at the starter solenoid. If so, mess a bit with the thin wire on the starter solenoid. Bad contact there can prevent the solenoid from activating. If no cure, measure the voltage at this thin wire while trying to start, it should read battery voltage.
If this is ok, then there is a good change that the starter/solenoid is the problem.
Also check the thick ground wires in between the engine and the body and see if they are attached properly and not corroded.
 
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#6 ·
Frango100 - The boxes are reporting 13V so I think I have enough potential behind me. Went to do some electrical diagnosis and my cheapo DMM was faulting so I finally ordered a good Fluke. Should have done that 5 DMMs ago! Anyway, I now have my new Fluke but the weather is lousy. Thanks again and I will report back.
 
#7 ·
Update - I do not get continuity between the starter relay and the solenoid. Digging a bit deeper I find that there is a connector (C102) in between and there is continuity between the solenoid and the connector but not between the starter relay and the connector. I verified the starter/solenoid is ok by using the starter relay input 12v to turn over the engine with the ignition on. It does not start, however. Not sure where to go from here...maybe open up the PDC and bypass the connector?
 
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