Low Voltage on Brake Output of Factory Brake Controller on a 2008 GMC Sierra 2500HD
Question:
Hello I am only getting 1.5 volts on my electric trailer break prong on the seven prof plug on the back of my truck and it’s not enough to get the trailer breaks to work. I have check my grounds by running a wire from negative battery terminal clear to back and bypass the grounds between the battery and the back of the truck and still getting low voltage. I think my break controls system relay is bad because it keeps coming up on the bash. Would that be causing my voltage problem as well ?
asked by: Dalton H
Expert Reply:
I would love to help but it sounds like you have a factory integrated brake controller (ITBC) on your 2008 GMC Sierra 2500HD and if that is the case then you would need to take the vehicle to a service center as this is not something we can really offer advice on. If you have an error message then that would explain the low voltage on the brake output wire.
However, this might be a good time to upgrade which I can almost guarantee will be more cost effective than most likely even the diagnostic procedure for your factory integrated brake controller (ITBC), let alone the actual repair bill. For this, I recommend the Tekonsha Primus IQ Trailer Brake Controller part # TK90160 which is a very good option that will outperform your factory integrated brake controller (ITBC) tenfold. In order to install this brake controller bypassing the factory integrated brake controller (ITBC), you will need to follow the instructions in the attached article.
Product Page this Question was Asked From
Tekonsha Primus IQ Trailer Brake Controller - 1 to 3 Axles - Proportional
- Trailer Brake Controller
- Proportional Controller
- Electric
- Automatic Leveling
- Under-Dash Box
- Dash Mount
- Up to 3 Axles
- LED Display
- Up to 90 Degrees
- Tekonsha
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Search Results: k71~449~00
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Shop: Dexter Heavy-Duty Suspension Kit for Tandem-Axle Trailers - 1-3/4" Wide Double-Eye Springs
- Shop: Step Wet Bolt for 1-3/4" Double Eye Springs
- Q&A: Electric Trailer Brakes not Working
- Search Results: center cap
- Video: Dexter Tandem Axle Trailer Heavy-Duty Suspension Kit Installation
- Shop: Replacement Shackle Strap for E-Z Flex Heavy Duty Rubber Suspension System by Dexter
- Shop: Replacement Flange Nut for Dexter Trailer Suspension Kits
- Shop: Replacement Shackle Link with Bolts for Dexter Trailer Suspension Kits
- Shop: Dexter Heavy-Duty Shackle Link for 1-3/4" Wide Double Eye Spring Suspension Kit - Qty 1
- Video: etrailer Electric Trailer Brake Kit Installation
- Q&A: Lug Nut Torque for Aluminum Trailer Wheels
- Q&A: Do Electric Brakes Need to Share Ground Wire?
- Q&A: Testing for Proper Voltage on the Brake Output Circuit
- Shop: Lionshead Trailer Wheel Center Cap w/ Snap-In Plug - 3.19" Pilot - Stainless Steel
- Q&A: How To Bypass Factory Brake Controller On 2016 Chevy Silverado with Tekonsha Brake Controller
- Q&A: Factory Brake Controller Port Location on 2018 Chevy Silverado 1500
- Shop: Brake Controller
- Article: Aftermarket Brake Control Wiring for 07-13 GM Full-Size Truck with Factory-Integrated Brake Control
- Article: Trailer Wiring Diagrams
- Search Results: trailer brake controller
- Q&A: Lug Nut Torque Chart for Trailer Wheels
- Shop: Trailer Wiring
- Video: Choosing the Right Brake Controller
- Shop: Trailer Hitch
- Search Results: brake controller
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Article: Trailer Tire Sizing
- Search Results: leaf spring