Amperage of Factory Brake Controller Pigtail on 2005 Dodge Ram

Question:

I have a 2005 Dodge RAM and the truck have the OEM harness located under the steering wheel, but in the plug have a label that indicate Max 15 Amp. The question is, How much Amperes the brake controler need to 12000 lb two axes trailer?

asked by: Francisco

Expert Reply:

We have never come across this 15 amp maximum. Take a look to see how that 12V feed is fused. I would consult the owners manual to find the location of the fuses that manage the towing circuits on your truck. They are usually located under the hood. Usually the 12v power feed for the brake controller has a 20 amp fuse for a 2 axle application. If you are concerned about it, you can always run a separate hot lead via a 20 amp circuit breaker like part # 9506 to the battery. For a two axle trailer with 4 brake assemblies, you would be drawing between 2.5 and 3 amps per brake assembly, for a total of around 12 amps.

expert reply by: Mike L