Can Trailer Wiring Connection Power Air Compressor?

[rmeJeep]

Looking at portable compressor options and I've seen a few people mention connecting to trailer wiring instead of directly to battery. What are the specs for trailer connection (Amps?) and is it enough?

Thanks!

Sponsored

 

[Heimkehr]

My 4-flat wiring harness uses a 10 amp fuse. It's intended to protect the parking/brake/turn signal lighting, and nothing else.

Possibly the 7-pin trailer connector has a bit more headroom. Crosswalk its fuse (i.e., amperage) rating to the power requirements of your compressor and go from there. Remember to build in a bit of overhead for safety, if possible.

I suspect that it's going to be better to create a separate and dedicated circuit, with the appropriate gauge wiring, to power the compressor. Frankly, that's how I'd want to proceed here.

 

[OminousSkitter]

At best, that really depends on the compressor. At worst, not a chance.

I’ve seen some simple cigarette lighter compressors that have long, small (high gauge) wires. That might work (check the amp ratings), but those are pretty much only good for topping off a low tire not filling one up after airing down. If you’re looking for the latter, based on wire gauges and lengths, trailer wiring is not nearly sufficient.

 

[Terrymo]

Battery positive on a 7 pin connector has a 30 amp fuse I believe
https://www.jlwranglerforums.com/JL-Wiring-Diagrams/TRAILER-TOW-SYSTEM.pdf

 

[rmeJeep]

I appreciate the 3 great replies! I was skeptical that it could handle a real compressor.

 

[greige]

I have rewired my compressor plug to work in the 7 pin trailer connector. The compressor draws less than 30 amps. The compressor is fairly hot after it inflates all 4 33" tires to 37 psi, but it works. I like it. I bought the Smittybilt 2.54 CFM Air Compressor - 2780

S/B2780

Sponsored