No Crank No Start Problem - JeepForum.com
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post #1 of 114 Old 10-22-2010, 09:59 AM Thread Starter
JKM
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No Crank No Start Problem

Need some thoughts here. Las weekend my 05 3.7L would not crank (would not even hear that starter engage, but could hear the relay). I installed a new battery since I was still running the OEM. It was fine all week until this morning. I also installed a new ignition switch about 6 months due the common problem with flickering dash and HVAC controls. Any suggestions on next steps in the diagnotics?

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post #2 of 114 Old 10-22-2010, 12:24 PM
meep
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possible problems:
ign sw
starter relay
starter solenoid
alarm defeat

I'd put a meter on the small wire at the starter solenoid, or a test light, and see if it glows when you try to start. if so, starter. if not, go upstream to relay.

you can bench test the relay by putting 12V across the coils and using a multimeter to see if the resistance (ohms) drops to/close to 0 when it clicks on. that will test the relay.

all bets are off if you have some sort of aftermarket starter disable, there will likely be a clumsily-installed cut-out relay somewhere in the dash, zip-tied to a loom...
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post #3 of 114 Old 10-22-2010, 12:35 PM Thread Starter
JKM
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Thanks for the quick reply. I assume the starter solenoid is mounted on the starter (haevn't been under it yet). While I'm down there I guess I should closely inspect the starter cable and connection.

I swamped out the relay with another 40amp relay last weekend so I assume that's not it. To rule out the ignition switch is the see if the relay is working (i.e. can i feel it click).

No aftermarket alarm. but I don't have an aftermarket remote starter, but without any hood switch (never bothered with it)
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post #4 of 114 Old 10-25-2010, 08:02 AM Thread Starter
JKM
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Over the weekend I cleaned the connections on the starter and used die-electric grease. I had also read in another thread the potential issue with the smaller wire terminal (yellow wire that activates the solenoid). As mentionned in the other thread the terminal for the yellow wire is not sealed and the corrosion at the crimp sometimes causes issues. I cut it off and install a new terminal and used shrink tubing to seal it. Installed with lots of die-electric grease. Seems to be working great. Time will tell and I will update in a about week.
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post #5 of 114 Old 11-01-2010, 08:49 AM Thread Starter
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1 week following the terminal replacement and connection cleaning all is working 100%. I will give another update in a week or so.
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post #6 of 114 Old 11-08-2010, 11:45 AM Thread Starter
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2nd week and no issues.
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post #7 of 114 Old 11-08-2010, 03:49 PM
mecca21wk
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i had the same problem. my starter solenoid was shot and my shifter bezel gear selector module needed to be replaced. thank god for the warranty or it would have been $1000.00
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post #8 of 114 Old 11-24-2010, 01:24 PM Thread Starter
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1 month and counting....this seems to have fixed the problem.
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post #9 of 114 Old 12-08-2010, 09:51 AM Thread Starter
JKM
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6 weeks and counting....this has fixed the problem.

I suspect many others may have replaced starters when it was a bad connection at the solenoid
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post #10 of 114 Old 08-07-2011, 02:18 PM
mwalters2
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Well, I fell victim to the no crank, no start problem today. Had it towed to the garage an told them to check the wiring before they start replacing parts. They said they would call tomorrow and give me the verdict. Let's see what the say.

2005 Jeep Grand Cherokee Larado 4.7L
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post #11 of 114 Old 08-08-2011, 07:30 AM Thread Starter
JKM
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The issue with the terminal on the solenoid can't be seen easily. If it works by jingling the wire or if it now starts, I would recommend changing out the terminal
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post #12 of 114 Old 08-16-2011, 08:35 AM
08-oIIIIIo-WK
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You can add me to the list of Jeep owners afflicted by this problem. This morning was the third time my 08 GC failed to start since I first encountered the problem this past winter. Crawling under the Jeep and wiggling the solenoid wire temporarily solves the problem - but that's never convenient. I guess I'll have to replace the connector this weekend. Jeep should release a TSB to fix this design flaw.
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post #13 of 114 Old 01-15-2014, 11:41 PM
dirtyjeepman
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WK will not start arrrgg

I just joined your club... 2010 WK.. will not start.. disconnected the + term and it worked fine for a few trys then same issue.. very flakey and intermintant.. Looks like I will be on my back fixing this problem..
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post #14 of 114 Old 01-16-2014, 04:50 AM
08-oIIIIIo-WK
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Just thought I'd share a longer term update. I gave the solenoid signal wire a good cleaning and gobbed it up with dielectric grease over two years ago and the problem never returned.
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post #15 of 114 Old 01-16-2014, 08:24 AM Thread Starter
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I'm over 3 years and my yellow wire terminal replacement did the trick. I believe this has also fixed the problem for many others on this board
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