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Electrical 4th Gen Dodge Ram Electrical Problems and Questions.


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  #1  
Old 12-07-2013, 06:43 PM
Fast FL Fast FL is offline
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Default Electrical - Short Circuit? 2014 Ram1500

Hello All,

I was trying to install my Radar Detector by hard wiring it to the Auto Dimming Mirror Harness. I have done it on 3 prior vehicles, using the J28.com wiring kit, but I think I may have jacked something up.
I am an electrical novice, but have a voltmeter. I already had the ground wire/pin installed and was attempting to install the 12v (with assesories/run feed only) pin in the back of the harness - when the two of them touched. There was a small puff of smoke (I had the dumb key in the "on" position!) and now I can't get power via that wire. I checked the remaining wires in the harness and they seem to funtion. I checked the fuse (90% sure I checked the right one) and it seemed fine.
I pulled everything back out and still have the harness just hanging from the front of the headliner.
Any ideas? Could i have "fried" just that one line without damaging the others or throwing the fuse? If so, what now?

I'm new here - just got the truck a couple of weeks ago. I appreciate the help/feedback and hope that someone with more knowledge/experience can give me some tips.
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  #2  
Old 12-08-2013, 01:27 AM
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Well you say you have a VOM meter. I would check the fuses with the meter to see if the fuse is blown. Sometimes just eye-balling the fuse you can mess up. Make sure you check the correct fuse (fuses).

I don't know how many circuits are in the mirror and if any go to a computer, 8.4 radio or TIPM module.

Making a dead short can cause real problems and could even damage the radio if you have a 8.4a radio. The radio controls the dimming mirror on-off function.

You need to check more.

Greg
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Old 12-08-2013, 05:57 AM
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Greg is on the money here. Dead shorts are a no no, especially with the key on. The new trucks are so electronically driven and connected, it would be difficult to speculate just what you did to it with a dead short. Hopefully, just a blown fuse. Let us know if we can be of any more help and keep us updated.
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Old 12-08-2013, 11:25 AM
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Default Everything else works!

OK - So I just went out to the truck and turned it on. The 8.4 Works (all funtions), everything in the center console works. The Headliner (garage, rear window, interior lights) all work.

I have not re-installed the rear view yet, but the only thing that seems to not work at the moment is the single 12v - in-line (pink with yellow strip).

I'll run through the voltmeter again after church, but I'm stuck. I would think that if I threw a fuse, other itmes would also be affected, no? Is there another fuse box besides the one in the engine bay? I've seen where some vehicles have a small interior box as well as the engine bay.

Thanks for the help - I'm open for ideas!
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Old 12-08-2013, 02:58 PM
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Checked the fuses again. Pulled F72 (voltage regulator) and F101 (mirror) - both are solid. Checked the line again - getting maybe 1-2 volts, instead of 12.

Next step - call dealer?
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Old 12-08-2013, 03:25 PM
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Try disconnecting the battery cable and let it sit for a few minutes and see what happens. It's a long shot but you never know.
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Old 12-08-2013, 04:01 PM
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Quote:
Originally Posted by JWM59 View Post
Try disconnecting the battery cable and let it sit for a few minutes and see what happens. It's a long shot but you never know.
Yeah, pull both cable off and touch them together. By touching them together you'll drain any voltage left.
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Old 12-08-2013, 06:13 PM
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I did as outlined above. No change. Also - went to Autozone to pick up fuses. None on the rack matched and the guy said he never saw ones as small as the ones in the truck.
This is nuts.
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Old 12-08-2013, 06:54 PM
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This circuit is probably controlled by the TIPM and by grounding that pin you inadvertently screwed up a chip on the light controller boards. A tracer probe would confirm if it goes to the TIPM, many (apart from the rear tails) now all pass via the TIPM light controller so they can be adjusted via the computer, no more fuses for those. If you re-install the rear view does everything work, even the lights, auto-dim everything?. Also the wire you tapped into, what is it used for in the Mirror, you may have said but I missed it.
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  #10  
Old 12-08-2013, 07:11 PM
Fast FL Fast FL is offline
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I haven't put the mirror back on yet. I kind of figure I have to bring it by the dealership at this point, so why put it back on.
I am not sure exactly what function the wire serves for the mirror. My mirror has the Assist and the 911 buttons in it, and is self dimming. The overhead lights, rear window, and garage door openers all work - as is.
That's just it - EVERYTHING seems to work with the exception of that one wire.
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