Honestly, I think it would be cheaper and easier to add to the hose. 28 amps is a pretty large draw, and the longer the cable, the larger the gauge wire you need. That would mean you would have to replace the entire wire back to its connections to lengthen the wire leads, unless they overbuilt the factory wiring, and I doubt that. I use a jumper box with a cheap airhead pump, but most of the time I leave mine inflated.
not sure helps? my dad rigged a two prong plug, I believe off of trailer lights. put matching plug on pump, he turns on headlights to make plug hot. no getting under the hood, we blew up ik's off we went.
I use this same pump. I solved the distance issue with a 12V gel cell motorcycle battery- Just take it where you need it.... no risk of running down your vehicle's battery. I keep it charged with a battery tender on my workbench so it's always ready to go.
I just got some 10 gauge black and red zip wire. 25' for $18. I'll pull the clamps off and remount them to the new wire.
The existing wire is probably closer to 12 or even 14 gauge. I figure some of the cheaper jumper cables are 10 gauge so I'm thinking I'll be fine. It's not optimal but then again it's not a long run time.
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