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Originally Posted by jeffgalati
I believe I am on the heavy setting. ... Never had an question until this truck. Last was a 2013 1500 with the 5.7 hemi.
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Originally Posted by jeffgalati
I didn't have the problem until I got this truck.
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Originally Posted by jeffgalati
They couldn't find anything. .
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Originally Posted by jeffgalati
I tested yesterday with the trailer plugged in amd at best I get 9.2v on the trailer. Also. That is with settings on Light Electric. When on Heavy Electric dropped to around 7v....More to come...
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Originally Posted by jeffgalati
Ok. . We can put 12v into plug atv trailer and in the distribution box we are only getting 9v max. All brake pucks have been tested we pull the emergency brake pin and trailer locks up so we know they all work. Really. Not sure what to look at next. Also put a new plug on front. Any more suggestions?
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Originally Posted by jeffgalati
Good to know but the repair guy tried on his truck as well and also simply putting 12v directly intobthe plug. I will keep thatvin mind though.
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Originally Posted by jeffgalati
I may be using the wrong term. The junction box I am talking is at the front where the pigtails wires simply connect to the trailer wires on individual studs. So it a simple straight shot from the truck to this point and there is 12v at the truck.
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OK, using some "deducing" kind of thinking, your trailer worked OK with the last truck, the trailer brakes lock up when the disconnect switch is activated, you get 9.2 volts on the light setting and that drops to 7.? volts on the heavy setting, you get 12 volts INTO the distribution box and 9 volts out if the distribution box.
Conclusions:
1. Your trailer is functioning like it did before when the truck operated properly, so your trailer can be removed as a possible problem.
2. You "think" you were on the heavy position on the brake controller when you were having the problem. (Need to verify this)
3. On "light position" you get 9.2V, on "heavy position" voltage drops. Check the Chrysler troubleshooting guide, but I believe the voltage should INCREASE when in the "heavy position".
4. Voltage "IN" vs voltage "OUT" of the Junction box is different. Either a bad connection, corrosion or it's more than just a connection box.
5. The tech connected your trailer to his truck and it functioned normally (confirming no fault with trailer)
6. There has to be either a faulty setting/connection on the OBC, the brake controller or the junction box. I'd hook it up, make sure you are in the "heavy setting, doublecheck that it is "still faulty" by trying to stop the trailer with the brake controller manual slide switch, If it does not function normally, then take the truck to Chrysler and insist they replace the brake controller, the junction box and the rear plug on the truck. One (or more) of them has to be your problem if the trailer previously functioned normally and is still functioning normally with another tow vehicle.
ADDED: Chrysler is not "infallible". It is possible they installed the incorrect part number brake controller and/or did not set the OBC properly at the factory or the setting may have been altered further down the assembly line. The dealership either needs to start from scratch to reboot the computer/brake controller so they "talk to each other' properly, or replace the components and then start from scratch. I believe the problem is in the truck, it's really up to Chrysler to figure this one out, but my guess would be that the brake controller is faulty or it's that questionable "distribution box"
Good Luck