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Unread 03-18-2015, 10:47 AM   #1
AdrianK
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Replaced Heating Core, Now Jeep Won't Start...

Hey guys,

I just replaced the heater core on my jeep yesterday, everything went swimmingly, but now for some unknown reason the jeep won't start. I turn the ignition and the starter doesn't even click now.

The jeep had absolutely no problems running pre-Heater Core exchange, and I didn't touch anything that wasn't directly related to what I was working on. I followed This guide from the website to the letter.

I'm thinking I knocked something loose when I was mounting it back under the dash, but I can't see anything unpluged when I get under there to look around (I really think this is the problem, as the guages on the dash don't so any more than light up now). So then I thought maybe I knocked something loose in the engine compartment, but I don't see anything loose in there either.

The battery is 95% charged, so that isn't the problem either, and it powers the lights when I turn the key into that position.

Any ideas on what could be the problem?

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Unread 03-18-2015, 10:49 AM   #2
AdrianK
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Forgot to mention, its a 1994 manual 4cyl, if that matters much.
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Unread 03-18-2015, 10:50 AM   #3
mike134
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Does the Check Engine Light (CEL) come on when you turn the key to ON (not start)?

do any indicator lights come on when you turn the key to ON?
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Unread 03-18-2015, 11:15 AM   #4
boduke5051
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From the sounds of it, I would double or triple check all of the wiring to the starter. Possibly something came loose from the positive battery terminal when you had the battery and the tray out.

Also double check all of the ground connections from the battery.
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Unread 03-18-2015, 12:10 PM   #5
AdrianK
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No indicator lights come on at all when the key is turned to ON. I am currently checking the wires to the starter, so far nothing looks amiss.
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Unread 03-18-2015, 12:44 PM   #6
mike134
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Will your radio power up with the key in the ON position?
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Unread 03-18-2015, 12:51 PM   #7
AdrianK
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Nope. No power to anything inside the car.
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Unread 03-18-2015, 12:56 PM   #8
Drednot
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Pics of the battery firewall area?


Is that gang of ground wires to the firewall hooked up/ clean and tight?
dscn2732.jpg  
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Unread 03-18-2015, 01:38 PM   #9
AdrianK
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Heres what I'm working with. Not so clean, but everything is like how it was when I bought the car a few months ago. Took the battery out to get a picture of behind the battery, just incase.

My father said maybe I should open the fusebox and check inside of it to see if anything got loose in there when I had to move it to get to the heater core. Sound like a good idea? I know less than nothing about electrical work, so I don't wanna jump into that and mess something up if it won't even help me.

I'm going to have to head out to work in the next few minutes, so this is probably as far as I'm getting on this today. I really, really appreciate all the help guys!
imag0009.jpg   imag0010.jpg   imag0011.jpg  
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Unread 03-18-2015, 02:03 PM   #10
bharris68
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Check the ground from the battery to the motor and the condition of the ground in general. It sounds like it's fractured inside the insulation.
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Unread 03-18-2015, 02:06 PM   #11
JeepinJeremy
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Did you scrape the paint out of those fancy painted battery terminals?
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Unread 03-18-2015, 02:15 PM   #12
AdrianK
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The battery terminals work. no paint on the inside.

Quote:
Check the ground from the battery to the motor and the condition of the ground in general. It sounds like it's fractured inside the insulation.
Will do! I'll report back with how that looks when I get a chance.
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Unread 03-18-2015, 02:29 PM   #13
bergovoy
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check the fuse panel FIRST.. everytime..

there is a main fuse there and a couple others that may have been blown..

also, there is a large connector between the fuse box and the firewall, that connects the wiring between the inside and outside...

check that connector..

also, there is another connector near above the pedals that connects the steering column to the rest of the system... it sounds like you arent getting any 'signal's from the ignition switch to the 'anything else' really


good luck
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Unread 03-18-2015, 04:20 PM   #14
TSEJEEPERS
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Yep check the fuses first!
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Unread 03-19-2015, 08:46 AM   #15
AdrianK
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Oh I think I may have been unclear; I checked all of the fuses, they work fine. I meant the inside of the fusebox, like under the fuses. It looks like it comes off, so I imagine it could be in there somewhere?
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electrical issue , heater core , ignition trouble , starter issue

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