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Unread 11-05-2013, 07:08 PM   #1
boatsandhose
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1990 YJ Wrangler 
 
Join Date: Jan 2013
Location: North Logan, UT
Posts: 134
90 YJ back with the gremlins.

Had some troubles before, thought it was good, but now I'm back scratching my head.

There are 3 wires that fried when I tried to start it the other day:
-One underneath the battery tray that got trail repaired with the only wire we had; 18 gauge speaker wire. I've already replaced that one with 12 gauge.
-One that goes from the ECU, out the firewall, along the harness and down under the battery tray and I believe connects to the starter solenoid.
-One that goes from the junk under the battery tray along the harness and clear over to a pin on the bulkhead connector.

Having troubles diagnosing this one. I have a hunch it was one of the wires on the solenoid that wasn't connected all the way and was arcing. The nut on the wire wasn't super loose, but wasn't very tight.

Right now I'm attempting to replace these wires but am having trouble pulling the pin out of the bulkhead. Is there a special tool for this?

Here are some pics:












Any help is appreciated, thanks!

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90 YJ 2.5L Posilock, metalcloak front bumper, superwinch lp8500, teraflex hand throttle, genright rocker gaurds, 33x12.5x15 BFG KM2s. Swaybar and Trackbar MIA.
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Unread 11-06-2013, 03:02 AM   #2
boatsandhose
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1990 YJ Wrangler 
 
Join Date: Jan 2013
Location: North Logan, UT
Posts: 134
Bump

Sent from my Galaxy Nexus
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90 YJ 2.5L Posilock, metalcloak front bumper, superwinch lp8500, teraflex hand throttle, genright rocker gaurds, 33x12.5x15 BFG KM2s. Swaybar and Trackbar MIA.
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Unread 11-06-2013, 05:52 AM   #3
Que89YJ
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1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 15,554
I think this is what you are looking for:
http://www.jeepforum.com/forum/f12/r...d-pins-940109/

I would make sure you have the problem nailed down. That is because of a dead short not a loose terminal.
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Unread 11-06-2013, 07:53 AM   #4
boatsandhose
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1990 YJ Wrangler 
 
Join Date: Jan 2013
Location: North Logan, UT
Posts: 134
Thanks. I do have that blue "lock" thing on mine so I'll play with that. What is the best way to find the dead short?

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90 YJ 2.5L Posilock, metalcloak front bumper, superwinch lp8500, teraflex hand throttle, genright rocker gaurds, 33x12.5x15 BFG KM2s. Swaybar and Trackbar MIA.
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Unread 11-06-2013, 09:01 AM   #5
Que89YJ
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1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
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Do you have a multimeter? You need to be able to measure resistance to find out what went wrong. If you dont have one they are cheap enough. HF and Radio Shack have them for $20 or so.
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Unread 11-06-2013, 09:22 AM   #6
boatsandhose
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1990 YJ Wrangler 
 
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Location: North Logan, UT
Posts: 134
I do have a multimeter. Should I check it at the bulkhead?

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90 YJ 2.5L Posilock, metalcloak front bumper, superwinch lp8500, teraflex hand throttle, genright rocker gaurds, 33x12.5x15 BFG KM2s. Swaybar and Trackbar MIA.
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Unread 11-06-2013, 09:52 AM   #7
Que89YJ
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1989 YJ Wrangler 
 
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Location: Detroit, Michigan
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Yes. Disconnect the battery lead and see if you have a short from that line.
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Unread 11-06-2013, 11:38 AM   #8
boatsandhose
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1990 YJ Wrangler 
 
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Location: North Logan, UT
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Ok thanks I'll go at it today and post what I find out.

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90 YJ 2.5L Posilock, metalcloak front bumper, superwinch lp8500, teraflex hand throttle, genright rocker gaurds, 33x12.5x15 BFG KM2s. Swaybar and Trackbar MIA.
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Unread 11-06-2013, 04:03 PM   #9
boatsandhose
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1990 YJ Wrangler 
 
Join Date: Jan 2013
Location: North Logan, UT
Posts: 134
Was able to get the lock out, but I can't get the pin out. Pushing down on the top of the pin and pull the wire right?
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90 YJ 2.5L Posilock, metalcloak front bumper, superwinch lp8500, teraflex hand throttle, genright rocker gaurds, 33x12.5x15 BFG KM2s. Swaybar and Trackbar MIA.
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Unread 11-06-2013, 05:44 PM   #10
Que89YJ
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1989 YJ Wrangler 
 
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Location: Detroit, Michigan
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Yes
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Unread 11-06-2013, 05:45 PM   #11
Que89YJ
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1989 YJ Wrangler 
 
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Location: Detroit, Michigan
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You have to disconnect it from the firewall
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Unread 11-06-2013, 05:56 PM   #12
boatsandhose
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1990 YJ Wrangler 
 
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Location: North Logan, UT
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The bulkhead is disconnected from the firewall.

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90 YJ 2.5L Posilock, metalcloak front bumper, superwinch lp8500, teraflex hand throttle, genright rocker gaurds, 33x12.5x15 BFG KM2s. Swaybar and Trackbar MIA.
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Unread 11-06-2013, 07:11 PM   #13
Que89YJ
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1989 YJ Wrangler 
 
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Location: Detroit, Michigan
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Then it should pull out of the back of the detent is being pushed back when you are pulling on it.
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Unread 11-10-2013, 09:41 AM   #14
boatsandhose
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1990 YJ Wrangler 
 
Join Date: Jan 2013
Location: North Logan, UT
Posts: 134
Anybody know how to remove the harness from the ECU? I've removed the glovebox and the two mounting screws for the ECU.
__________________
90 YJ 2.5L Posilock, metalcloak front bumper, superwinch lp8500, teraflex hand throttle, genright rocker gaurds, 33x12.5x15 BFG KM2s. Swaybar and Trackbar MIA.
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Unread 11-11-2013, 05:44 PM   #15
boatsandhose
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1990 YJ Wrangler 
 
Join Date: Jan 2013
Location: North Logan, UT
Posts: 134
Okay got the 3 burnt wires rewired, turned the key and it fired right up. It doesn't turn off when I turn the key and the blower motor runs whenever the negative cable is connected. After it ran for maybe 15 seconds I disconnected the negative cable and it won't start anymore. There are a couple of wires that got burnt that are underneath the dash that I need to replace and am having a hard time tracing them home. My FSM isn't telling me much. Near the mess underneath the battery tray there is a red wire with a white tracer that goes into a fusible link and comes out green on the other side. I can't figure out where it is supposed to go to as it is all melted away. Anyone have any idea?
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90 YJ 2.5L Posilock, metalcloak front bumper, superwinch lp8500, teraflex hand throttle, genright rocker gaurds, 33x12.5x15 BFG KM2s. Swaybar and Trackbar MIA.
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