equipment fed by m3 fuse drawing 2-3 amps on battery when car off

The link below will provide you with a diagram of ‘each’ fuse and the applicable circuits : ⬛️ ▪️ http://www.autogenius.info/dodge-journey-2010-fuse-box-diagram/ ▪️⬛️

This is the only way you will find the battery drain - PROVIDED you are testing the CORRECT fuse and related circuits. Have a look at the video posted in other answer so you’ll know exactly how it’s done. Otherwise you’ll just be spinning your wheels!

IF you think the posted information herein is beyond your automobile troubleshooting and repair capability - seek *hands-on* help from qualified personnel. GOOD LUCK!