I purchased a P2 brake controller used off eBay.I have a question as to how it works when no trailer is attached. At first mine simply showed a screen with the 2 dots and would do nothing when the brakes were applied. If I moved the manual lever it would show NC. I believe this is how it is supposed to work.Fast forward to this weekend. I pulled our camper to our local campground and all seemed to be working fine. Camper brakes worked great. I disconnected the camper and it started showing NC all the time except when you hit the brakes then it would show the 2 dots nothing else. When I shut the truck off and it sat it never went into low power mode.Is my controller bad? I've double checked all the wiring at the controller, under the dash and at the rear connector. Everything looks good. I pulled the fuse and reinstalled it and it seems to functioning as before, but I haven't reconnected the camper yet.Second question, when applying the brakes while driving how how should the displayed voltage to? Mine never got over 2-3 volts, most of the time it was 1.5-2. The trailer seemed to be braking fine and wasn't pushing the truck. I'm guessing I'm just not knowledgeable enough on how controllers work. My last one didn't have a display so I had no way of knowing output voltage.I'm hoping you wise people can help me out with my questions.Thanks,Gary

Sounds normal to me. If you didn't get an owner's manual, one is probably available online. The controller will stay lit for a few minutes after the key is off.

Your controller is working perfectly...the 2 "dots" are indicating that you have power and that you have the controller set to "boost 1."Here is your manual....P2 Manual..LINK

I know what the dots mean and i know that is normal, but I have a manual and the way I read it when there is no trailer the NC should only light if I slide the manual brake control. Mine was showing NC all the time after I disconnected my trailer. And it did not turn off after more than 30min of sitting.I pulled the fuse and put it back in and for now it is working right. I will see tomorrow after towing the trailer home if I start having the constant NC lit again.I was hoping someone with this controller could tell me how their units acts.

phipps33 wrote:I know what the dots mean and i know that is normal, but I have a manual and the way I read it when there is no trailer the NC should only light if I slide the manual brake control. Mine was showing NC all the time after I disconnected my trailer. And it did not turn off after more than 30min of sitting.I pulled the fuse and put it back in and for now it is working right. I will see tomorrow after towing the trailer home if I start having the constant NC lit again.I was hoping someone with this controller could tell me how their units acts.I agree with what you are saying here. Mine works that way: if unplugged from the trailer, all I get is the two dots, and I do not get the NC ( not connected ) unless I pull the manual lever.Mine goes off after shutting the truck off after about ten minutes. Unless I touch the brake pedal, as that is what wakes it up again.Call teckonsha and ask them about it.Your output voltage sounds about typical for normal braking. If you were to go into a full on panic stop, you will see higher voltages going to the trailer.

gmw photos wrote:I agree with what you are saying here. Mine works that way: if unplugged from the trailer, all I get is the two dots, and I do not get the NC ( not connected ) unless I pull the manual lever.Mine goes off after shutting the truck off after about ten minutes. Unless I touch the brake pedal, as that is what wakes it up again.Call teckonsha and ask them about it.Your output voltage sounds about typical for normal braking. If you were to go into a full on panic stop, you will see higher voltages going to the trailer.Thank you, I was looking for input from someone who has one. I am going to call Tekonsha after the holiday.Even if the controller is shot, I won't be out too much. I got it for a good price.

P2 Controller Issue | Good Sam Community

coolbreeze01
Explorer
May 25, 2014
Sounds normal to me. If you didn't get an owner's manual, one is probably available online. The controller will stay lit for a few minutes after the key is off.
downtheroad
Explorer
May 25, 2014
Your controller is working perfectly...the 2 "dots" are indicating that you have power and that you have the controller set to "boost 1."

Here is your manual....P2 Manual..LINK
phipps33
Explorer
May 25, 2014
I know what the dots mean and i know that is normal, but I have a manual and the way I read it when there is no trailer the NC should only light if I slide the manual brake control. Mine was showing NC all the time after I disconnected my trailer. And it did not turn off after more than 30min of sitting.

I pulled the fuse and put it back in and for now it is working right. I will see tomorrow after towing the trailer home if I start having the constant NC lit again.

I was hoping someone with this controller could tell me how their units acts.
gmw_photos
Explorer
May 26, 2014
phipps33 wrote:
I know what the dots mean and i know that is normal, but I have a manual and the way I read it when there is no trailer the NC should only light if I slide the manual brake control. Mine was showing NC all the time after I disconnected my trailer. And it did not turn off after more than 30min of sitting.

I pulled the fuse and put it back in and for now it is working right. I will see tomorrow after towing the trailer home if I start having the constant NC lit again.

I was hoping someone with this controller could tell me how their units acts.

I agree with what you are saying here. Mine works that way: if unplugged from the trailer, all I get is the two dots, and I do not get the NC ( not connected ) unless I pull the manual lever.
Mine goes off after shutting the truck off after about ten minutes. Unless I touch the brake pedal, as that is what wakes it up again.
Call teckonsha and ask them about it.

Your output voltage sounds about typical for normal braking. If you were to go into a full on panic stop, you will see higher voltages going to the trailer.
phipps33
Explorer
May 26, 2014
gmw photos wrote:

I agree with what you are saying here. Mine works that way: if unplugged from the trailer, all I get is the two dots, and I do not get the NC ( not connected ) unless I pull the manual lever.
Mine goes off after shutting the truck off after about ten minutes. Unless I touch the brake pedal, as that is what wakes it up again.
Call teckonsha and ask them about it.

Your output voltage sounds about typical for normal braking. If you were to go into a full on panic stop, you will see higher voltages going to the trailer.

Thank you, I was looking for input from someone who has one. I am going to call Tekonsha after the holiday.

Even if the controller is shot, I won't be out too much. I got it for a good price.
westend
Explorer
May 26, 2014
The P2 display with NC means not connected. Your controller sounds like it is working fine. I'd suggest you put some tape over the display.
gmw_photos
Explorer
May 26, 2014
From the prodigy manual:
NC means:

Power to Prodigy without trailer connected. Displays for 15
seconds then changes to: ( dot, dot )
phipps33
Explorer
May 26, 2014
gmw photos wrote:
From the prodigy manual:
NC means:

Power to Prodigy without trailer connected. Displays for 15
seconds then changes to: ( dot, dot )

Mine wasn't doing that when I pulled the camper up and then disconnected. Went through everything to make sure it wasn't a wiring issue and pulled the fuse to "reset" it.

Pulled the camper home today and when I disconnected it was showing the 2 dots by the time I got back to the cab and checked.

It seems to be working fine now. Not sure what it was, maybe just a glitch.

Thanks for the responses and info!
gmw_photos
Explorer
May 26, 2014
phipps33 wrote:
gmw photos wrote:
From the prodigy manual:
NC means:

Power to Prodigy without trailer connected. Displays for 15
seconds then changes to: ( dot, dot )

Mine wasn't doing that when I pulled the camper up and then disconnected. Went through everything to make sure it wasn't a wiring issue and pulled the fuse to "reset" it.

Pulled the camper home today and when I disconnected it was showing the 2 dots by the time I got back to the cab and checked.

It seems to be working fine now. Not sure what it was, maybe just a glitch.

Thanks for the responses and info!

Yeah, you probably right, pulling the fuse caused it to do a hard reset and cleared things out.
Glad it's working right for you. I have been happy with mine, it works well for the three different trailers I pull with this truck.
phipps33
Explorer
May 26, 2014
gmw photos wrote:

Yeah, you probably right, pulling the fuse caused it to do a hard reset and cleared things out.
Glad it's working right for you. I have been happy with mine, it works well for the three different trailers I pull with this truck.

I previously had a Tekonsha Voyager and was pleased with it. Heard great reviews about the P2. I really like my P2 so far. Very easy to set up especially with the prewired pigtails.