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Heating & Cooling 3rd Gen Dodge Ram Heating & Cooling Problems and Questions.


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  #21  
Old 07-15-2010, 11:20 PM
usafnewb usafnewb is offline
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Quote:
Originally Posted by Remerson228 View Post
Yeah, it will place more of a load on the alternator, but nothing it can't handle. If you want to rewire, you may as well use the compressor to activate the coil side of the relay and feed the fan from the battery.
I will probably just wire it into an IGN source. If I wanted to use the compressor to activate the coil side of the relay, how would I go about doing that? I apologize if I'm bugging you over this, but I do appreciate your help with it.

Matt
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Old 07-16-2010, 12:39 PM
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Ok, so on my late 80s model vehicles I could tie into the ignition system by wiring right into the appropriate fuse. Dodge uses mini-fuses which are impossible to run a wire into. How else can I wire my a/c condenser fan into the ignition system so it runs whenever the truck is running? Thanks in advance for any help you guys can give on this!

Matt
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  #23  
Old 07-16-2010, 12:52 PM
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Splice into the DB/BK wire on the compressor clutch and run it to terminal 85 on the relay. Run a ground wire to 86. 18 gauge wire will work fine for these two terminals. Pull a fused battery feed wire (at least 12 gauge with a 25 amp fuse) to terminal 30 and then splice the power wire to the fan into terminal 87. I strongly recommend soldering the wire to the spade terminals that plug into the relay or get a relay pigtail and solder the splices there.
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Old 07-16-2010, 03:27 PM
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Randy,

Thanks for the instructions. I found an unused relay inside the fuse box that i wired into. I put a male connector on the fused wire and plugged it into the terminal that got power when the ignition was on. I ran a ground wire to the frame and now the system is up and running. I will try your instructions this weekend but needed a quick fix for now to get me by. Thanks for your help!

Matt
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  #25  
Old 07-16-2010, 04:45 PM
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Since you've gone this far already, just change the switched ign wire to the wire on the compressor when you have time. That should get you where you want to be.
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