AMC Eagle Den Forum
The Mighty 258 => Engine Electrical Systems. => Topic started by: 88formula on September 18, 2015, 01:28:43 PM
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While diagnosing my no power to the ecm I found all these relays under the hood and I have no clue what they are for... any help would be appreciated.
(http://i169.photobucket.com/albums/u216/fetusking/Mobile%20Uploads/20150917_191234.jpg) (http://s169.photobucket.com/user/fetusking/media/Mobile%20Uploads/20150917_191234.jpg.html)
(http://i169.photobucket.com/albums/u216/fetusking/Mobile%20Uploads/20150917_191238.jpg) (http://s169.photobucket.com/user/fetusking/media/Mobile%20Uploads/20150917_191238.jpg.html)
(http://i169.photobucket.com/albums/u216/fetusking/Mobile%20Uploads/20150917_192120_1.jpg) (http://s169.photobucket.com/user/fetusking/media/Mobile%20Uploads/20150917_192120_1.jpg.html)
And what is this guy for? There's a little circuit board inside it?!
(http://i169.photobucket.com/albums/u216/fetusking/Mobile%20Uploads/20150917_191245.jpg) (http://s169.photobucket.com/user/fetusking/media/Mobile%20Uploads/20150917_191245.jpg.html)
More questions!!!! Does anyone have a picture of where the factory foot lamps are supposed to go in the interior? Mine are just laying on the ground..
(http://i169.photobucket.com/albums/u216/fetusking/Mobile%20Uploads/20150917_192722_1.jpg) (http://s169.photobucket.com/user/fetusking/media/Mobile%20Uploads/20150917_192722_1.jpg.html)
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The box with the circuit board is the diode trio. That tells the sol-vac to kick in when the rear defrost, A/C or headlight are on. The footwell lights normally mount to the rear of the package tray. I've only seen one mounting hole in an SX/4 on the drivers side. I drilled one for the passenger side.
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Picture # 3, I have seen the fog light relay mounted in that location before, but can't remember if there might something else that also gets mounted in that vicinity.
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Awesome! !! I was wondering where that diode pack was located! And the factory fog lights don't work ether, now I got a place to start diagnosis!
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The factory fog lights (that I've owned, anyway) have all had issues with corroded or burned contacts where the bulbs seat. They use H2 bulbs.
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Isn't the diode trio usually in the alternator?
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hi, in picture #1 the small square one is the manifold heater relay, and the larger rectangular one is the horn relay. gz
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Sweet!! I'm going to unplug them and test to verify.
I know what your thinking about in the alternator, there are 3 sets of 3 diodes in the alternator. The diode treo that were talking about on the fire wall is to boost idle when headlights are turned on, or the rear defroster, or the a/c compressor is engaged.
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Ok, you need to tap the gas to get that to engadge. I turned the idle down then turned stuff on and that's why the idle went back up till I turned stuff off. Thanks
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Sweet!! I'm going to unplug them and test to verify.
I know what your thinking about in the alternator, there are 3 sets of 3 diodes in the alternator. The diode treo that were talking about on the fire wall is to boost idle when headlights are turned on, or the rear defroster, or the a/c compressor is engaged.
2 sets of 3 diodes in each alternator. (Delco ones) 3 windings in the alt with each stator set having a positive and negative diode to cut the other half of the Alternating current the alternator makes to turn it into Direct current, "rectifying" it.
https://www.youtube.com/watch?v=cyhzpFqXwdA