2017 Mountain Aire 4553/2017 Jeep Wrangler, blue ox electric cable not working

[wifey]

Newmar 2017 Mountain Aire 4553, and Jeep 2017 Wrangler, Blue Ox Cable (signal lights, brake lights etc not working) put a new blue ox cable on {7-6 hookup} and still no results. Don’t think it’s the blue ox cable. Signals and all lights working on the MA but nothing on the Jeep. Where do we begin to look? Blue ox is 7-6 hookup. FUSES IN JEEP OR MOUNTAIN AIRE?

[ByeTheWay]

If all the lights on the motor home work, and the lights on the Jeep work, I'd suspect the tow package is the issue. Test both individually first.

[Mr_D]

Get a multi meter, even a cheap $7 one from Harbor Freight is good enough for this and start testing the output at the MH plug, if OK then plug the Blue Ox cord in and test again at it's Jeep end. From then on you'll need to test and see if the voltage is getting to the back of the Jeep.

[Dutch Star Don]

On my Freightliner chassis, there is a fuse panel in the rear battery bay, that has fuses for just the tow harness. Maybe someone with a Spartan can tell you if it has the same/similar panel that does the same thing.

[kpecks]

Check the rear passenger side panel where the chassis batteries are located. I had two fuses go out before while towing. Also check they internals of the cable. Check the harness on the vehicle. Also, if you have LEDs check the fuses in your vehicle. Sometimes the diodes will cause fuses to blow.