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Unread 01-24-2015, 04:25 PM   #1
1984GreenCJ
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1984 CJ7 
 
Join Date: Sep 2014
Location: Birmingham, Alabama
Posts: 28
Will Not Crank

My jeep will not crank all of a sudden. When I turn the key the battery initially shows volts but will not turn. Then it shows 0. I replaced the battery and got the same result. The first attempt there will be a quick noise. Nothing happens on subsequent tries.

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Unread 01-24-2015, 05:07 PM   #2
jammer1
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1979 CJ7 
 
Join Date: Jan 2009
Location: cleveland,, ohio
Posts: 232
Check your connections for corrosion. The starter solenoid should click when the key is turned. If someone can turn the key with you standing next to it you should hear the click of the magnets. If you hear the click and still no start while the key is turned to start (have them hold the key in that position) take hold of the cable that goes from the starter solenoid (the rubber part of the cable by the solenoid) and try moving it on the solenoid post. If it moves and had corrosion you might hear the starter try to turn. Next reach down and try the other end of the cable by the starter. Be carefull of moving parts. If you have a volt meter you can check for voltage at the batt side of the solenoid then with the key turned check the other side. If you have approx. 12v keep working your way down to the starter. If the starter has 12v you need to check (clean the connection) of the cable to the starter. After that if you have the 12v at the starter you need to check for ground. Make sure the grounds are clean and you have grounds from the engine to the battery or to the frame then the frame to the battery and all connections are clean.
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Unread 01-25-2015, 03:21 AM   #3
John Strenk
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1976 CJ5 
 
Join Date: Feb 2005
Location: Shalersville Ohio
Posts: 13,532
You've probably never notice before but the OEM volt gauge always goes to Zero when cranking the engine to start it running.
This is because the volt meter is tied into the ACC circuit which is disconnected when the Key is turned to the START position.
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Unread 02-06-2015, 05:16 PM   #4
1984GreenCJ
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1984 CJ7 
 
Join Date: Sep 2014
Location: Birmingham, Alabama
Posts: 28
New solenoid and new ignition switch and still the same issue. Any ideas? I did show 25v at the blue wire terminal on the soleniod which i thpught was high.

Starter will turn when power is run direct from battery.
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Unread 02-06-2015, 05:39 PM   #5
BozCJ7
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1984 CJ7 
 
Join Date: Jul 2011
Location: Ridgeway, South Carolina
Posts: 18
If it's an automatic, the neutral safety switch may be disconnected. I had this problem a while back. It's located on the top driver side of tranny. It won't allow the jeep to start in gear, if it's disconnected it won't do anything.
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Unread 02-06-2015, 06:25 PM   #6
jammer1
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1979 CJ7 
 
Join Date: Jan 2009
Location: cleveland,, ohio
Posts: 232
When you have the key turned to start, check the connection (with volt meter) on the solenoid side that goes to the starter. It should be 12 to 13.5 volts. If it's not, check the ground at the mounting flange. The blue wire comes from the neutral switch. It gives 12v to the terminal which energize the solenoid. This connects the battery side to the starter side. If no ground, solenoid doesn't work. If no 12v at the terminal (blue wire) then check the trans like mentioned above. If it's plugged in, on some you can put a jumper (connecting the two terminals on the wire harness) on the wire harness (by pass the switch) and then try the key.
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Unread 02-07-2015, 08:03 AM   #7
2Xtreme
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1979 CJ7 
 
Join Date: Dec 2003
Location: Schenectady, NY
Posts: 1,269
I'd start with battery terminals and grounds.
(I ALWAYS start with grounds when having electrical problems)

Mine was the ground at the block. Wire corroded inside the terminal.

I couldn't find the problem for an hr until the wire fell out of terminal and was hanging there bare.
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