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Old 10-11-2011, 08:09 PM   #1
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So here's an interesting problem....

I ran out of my office at lunchtime today to run a couple errands. I finish my errands, jump in the trusty TJ ('97 4.0L 5 speed) and turn the key. Everything came on like it normally would for a split second, and then went dead - I turn the key off and on once or twice and nothing. I turn the key on and turn the fan all the way up and everything magically comes back to life. It's worth mentioning that my fan only works on high. Any thoughts on what could be causing this? Am I going to wind up stranded soon?
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Old 10-11-2011, 08:13 PM   #2
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It sounds like one or both of your battery cables are loose and/or corroded. Remove them both, wire brush the posts and connectors so they are bright and shiny, then solidly reconnect them. Once the nut is tight, make sure the connector is tight enough on the battery post so it cannot be moved/rotated with your hand. If you can't get the nut tight enough to make it so the connector can't be moved, reply back here and I'll give you a little tip on how to make it tight enough again.

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Old 10-11-2011, 09:56 PM   #3
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Quote:
Originally Posted by Cornbread907 View Post
It's worth mentioning that my fan only works on high. Any thoughts on what could be causing this?
if i'm not mistaken, bad blower motor resistor.
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Old 10-12-2011, 10:24 AM   #4
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Quote:
Originally Posted by Cornbread907 View Post
It's worth mentioning that my fan only works on high. Any thoughts on what could be causing this?
I had the same issue. Its the blower motor resistor. Its located under the passenger side dash. Not to hard to replace, I did mine. All speeds work now.
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Old 10-12-2011, 11:50 AM   #5
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Quote:
Originally Posted by Jerry Bransford View Post
It sounds like one or both of your battery cables are loose and/or corroded. Remove them both, wire brush the posts and connectors so they are bright and shiny, then solidly reconnect them. Once the nut is tight, make sure the connector is tight enough on the battery post so it cannot be moved/rotated with your hand. If you can't get the nut tight enough to make it so the connector can't be moved, reply back here and I'll give you a little tip on how to make it tight enough again.
+1! I carry a wire brush and some dielectric grease (among other things) for this exact reason. I've also heard that carbonated soda works in a pinch, but can't vouch for it. Seems like things would get rather sticky.....
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Old 10-12-2011, 11:55 AM   #6
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Wire brush it and put grease on it! I need to change my blower motor resistor as well
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Old 10-12-2011, 12:47 PM   #7
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Just took my resistor out and waiting for the new one to be delivered...
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Old 10-12-2011, 12:50 PM   #8
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^As stated, your battery terminals are probably loose, my g/f's wrangler had this issue not that long ago.
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Old 10-13-2011, 10:17 AM   #9
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Thanks for the input all - terminals were pretty crappy. I scrubbed them up, put crap on them and I should be in good shape. THe perplexing thing to me still is that everything came back to life when I turned the fan on high.

I also ordered a new resistor to fix that stupid fan....

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