I have no power at the trailer plug. The 12VDC pin is dead. I looked for the fuse but have had no luck in locating the fuse. The under hood block has a couple labeled trl. but they are good. Is there an inline fuse that goes to the 12 volt hot pin of the trailer connector. All the lights and brakes work fine. Its only the 12 volt pin that normally recharges your trailer battery that is not working. Can someone help? Thanks

2500HD 2005

Did you replace the stud 1 plug with a 40A fuse?

Did you replace the stud 1 plug with a 40A fuse?
X2, you need to install the fuse which is not supplied from GM. Cost you a couple bucks at the auto-parts store.

In the fuse block under the hood:

X2, you need to install the fuse which is not supplied from GM. Cost you a couple bucks at the auto-parts store.

My 40A fuse was in the trailering wiring harness bundle...

Stud # 2 30A (All the way to the top right) if standing at your RF wheel. If you dont have dual batteries you will need to add the 40A fuse in stud #1 (Top left).

Stud # 2 30A (All the way to the top right) if standing at your RF wheel. If you have a gasser and dont have dual batteries you will need to add the 40A fuse in stud #1 (Top left).

Diesel have 2 batteries and require the fuse to get 12v power to the trailer.

Diesel have 2 batteries and require the fuse to get 12v power to the trailer.

Had to add it on my 00 Tahoe too. GM for some unknown reason won't put the fuse into a vehicle ordered with a heavy duty trailering package...

Hmmm, I just put in a Prodigy and the paper work on the Gm harness said not to use the fuse if you had the towing package/dual batteries. I have not had it hooked to a trailer as of yet, but the controller works.

The wording is very confusing. We have all read it and thought the same thing at one time or another.
Short version...diesels need the fuse, gassers with 2 batteries don't.

Hmmm, I just put in a Prodigy and the paper work on the Gm harness said not to use the fuse if you had the towing package/dual batteries. I have not had it hooked to a trailer as of yet, but the controller works.

I had the same confusion when I first bought the Silverado. The Prodigy is fine with the GM harness, straightforward install. What you don't have is the 12V pos feed for the trailer.

Thanks guys!

Have any of you fella's been popping fuses from an over load? I have been running 30 amp fuses in mine for the power invertor in my enclosed trailer which tends to pop the fuse on occasion. I was thinking of pulling the fuse and installing a 30 amp breaker instead. Just wondering what your thoughts were on it.

Have any of you fella's been popping fuses from an over load? I have been running 30 amp fuses in mine for the power invertor in my enclosed trailer which tends to pop the fuse on occasion. I was thinking of pulling the fuse and installing a 30 amp breaker instead. Just wondering what your thoughts were on it.

You can only put around 375 W draws through a 30A fuse. If you are looking at an inverter that has a higher draw than say 300W, you may want to run a separate heavier line via another connector.

Everyone is right on the location, But is this a new install or did you blow the orignal if so you will need to find out why it blew and correct.

Everyone is right on the location, But is this a new install or did you blow the orignal if so you will need to find out why it blew and correct.

Since he said inverter, I am suspecting that it was drawing more than that line is set up to put through.

Everyone is right on the location, But is this a new install or did you blow the orignal if so you will need to find out why it blew and correct.

New from the factory, the truck doesn't have a fuse in that location. I'm not sure why Woodchuck is using a 30 amp fuse, though because factory made it to use a 40 amp fuse. Maybe that's his problem?

the 30Amp fuse is in Stud#2.

I can't take credit for the this link, another member posted it.

http://www.pirate4x4.com/tech/billavista/Chevy/tech/Prodigy/index.html

the 30Amp fuse is in Stud#2.

I can't take credit for the this link, another member posted it.

http://www.pirate4x4.com/tech/billavista/Chevy/tech/Prodigy/index.html


Excellent link!

New from the factory, the truck doesn't have a fuse in that location. I'm not sure why Woodchuck is using a 30 amp fuse, though because factory made it to use a 40 amp fuse. Maybe that's his problem?

Good Point, I was paying less attention to the 30 vs. 40 comment, but I still think that an inverter would draw too much power for that line. Especially if there is anything else pulling on it (like a hotel battery charging, fridge (Don't think that applies here), battery chargers for tools, etc.)

My bad for running the 30 amp fuse, i know i over exceeded it with the invertor which also is on its own battery in the trailer. I use the trailer plug to recharge the trailer battery, but since it has popped fuses i have thought of putting a breaker inline instead. This way it will reset itself and i wont have to wait for a dead battery to realize the fuse popped.

Thanks guys. You know to be honest I am not sure it ever worked. I had only used the trailer a few times and on weeke end trips or overnights and the battery in the trailer had enough power to last that long. I pulled a boner a few weeks ago and plugged the trailer plug in upside down. ( yes if its hot out the round plug will fit right in) and blew the trailer fuse (in the trailer) I replaced it and all works fine. I went to a race and used the trailer for 3 days and the battery run down. I started the truck and plugged in the trailer to charge it up but no go. I got my meter out and found that the 12 VDC pin was dead. Maybe I couldn't find the fuse because it isn't there. I look tomorrow in the day light. Thanks again.

Thanks guys. You know to be honest I am not sure it ever worked. I had only used the trailer a few times and on weeke end trips or overnights and the battery in the trailer had enough power to last that long. I pulled a boner a few weeks ago and plugged the trailer plug in upside down. ( yes if its hot out the round plug will fit right in) and blew the trailer fuse (in the trailer) I replaced it and all works fine. I went to a race and used the trailer for 3 days and the battery run down. I started the truck and plugged in the trailer to charge it up but no go. I got my meter out and found that the 12 VDC pin was dead. Maybe I couldn't find the fuse because it isn't there. I look tomorrow in the day light. Thanks again.

I'm betting you never had power because there was not a fuse there. They come with a red plug installed. Remove it, put in a 40 amp, and you're in business!

Thanks guys. You know to be honest I am not sure it ever worked. I had only used the trailer a few times and on weeke end trips or overnights and the battery in the trailer had enough power to last that long. I pulled a boner a few weeks ago and plugged the trailer plug in upside down. ( yes if its hot out the round plug will fit right in) and blew the trailer fuse (in the trailer) I replaced it and all works fine. I went to a race and used the trailer for 3 days and the battery run down. I started the truck and plugged in the trailer to charge it up but no go. I got my meter out and found that the 12 VDC pin was dead. Maybe I couldn't find the fuse because it isn't there. I look tomorrow in the day light. Thanks again.

I found out 2 trailers ago with the "new" Tahoe. My RV was in the shop, clowns ran the battery dead while there. I thought - no problem - I'll be able to charge up on the way to the camping trip to a dry campground (no electric). I get there, I still have a deadish battery. Check my charging line, it has no juice. I took it in under warranty to the dealer, to find that they had no idea why there was no power back there - until "I" am reading their service notes with the tech at the service bay, and found an obscure note about the fuse.

Daggone it, if Chevy hasn't continued to do it with the Silverado too. If I ordered a HD trailering package like I did with both, why wouldn't I expect all the lines to work? This time, though, I knew to check when I brought the truck home.

Glad I found this thread.
When I got my truck I took my Prodigy brake controller out of our ' Suburban, and put it in my '07 2500HD. I did have to change around two pins on the connector, since I used the harness from the '02 instead of having to put another one together.
Any way I never saw the fuse because my new wire harness wasn't used. Even the dealer didn't know why I wasn't getting 12V power back at the plug. One of the service tech's said I shouldn't have power back there any way. I said I guess you've never towed anything.
Any way thanks for the thread. Glad I got mine hooked back up so i can keep my TT battery charged while on the road.

I’ve read everything I can find on the “no power to the 7 pin trailer connector” problem, and still can’t figure out what’s wrong with mine. I have a 30 amp fuse in the stud-2 location (and a 40 amp in the stud-1 location), and a red wire with a black stripe connected to stud-2. There is 12 volts at the stud but not on the battery pin at the 7 pin connector. I checked all the pins in the connector but no battery anywhere. Is there another wire or fuse in the 08 diesel setup that I’m not seeing?

Thanks in advance for any ideas or help you can provide.

I’ve read everything I can find on the “no power to the 7 pin trailer connector” problem, and still can’t figure out what’s wrong with mine. I have a 30 amp fuse in the stud-2 location (and a 40 amp in the stud-1 location), and a red wire with a black stripe connected to stud-2. There is 12 volts at the stud but not on the battery pin at the 7 pin connector. I checked all the pins in the connector but no battery anywhere. Is there another wire or fuse in the 08 diesel setup that I’m not seeing?

Thanks in advance for any ideas or help you can provide.

Found still another thread on this topic, that discribed a second wire
taped to the wire bundle between the fuse box and fender. Sure enough, I had a wire there too, and it was completely covered by tape. Now I have to find that metric nut in my parts bin and I’ll be all set.

Thanks.