[Sandstone]

What can we do to keep corrosion off and protect all the contacts?

Once the contacts are cleaned up, find where moisture can get in and try to seal it, like gaps around the wire bundle where it comes into the box.

I also though about adding desiccant beads / gel or something like Steel Camel Moisture Hog into the box to soak up any moisture that gets in, which hopefully isn't much.

Power Desiccant - Advanced Technology

Steel Camel's Moisture is unique among competitors in its ability to trap elements of water and hold them.

www.steelcamel.com

 

[Sandstone]

I am now dealing with a front left turn signal bulb problem too.

That may be due to a corroded ground wire on G112. The wire can corrode in and around the eyelet crimp where it can be hard to see. The fix is cutting the old eyelet off, stripping the wires back to good metal and adding a new eyelet.

More info on the grounds here:

https://www.jeeppatriot.com/threads/engine-bay-grounds-g110-g111-and-g112-location-and-wiring-diagrams.341159/

The red jumper wire may be on the main relay:

Voltage to wires are low.

You might also check wiring between the TIPM and the bulb socket, sometimes there's corrosion on the connector pins, and in some cases the wire can break at the socket under the insulation.

The most recent wiring diagrams we have are for 2014, you can download them here:

Wiring Diagrams

Downloadable PDF - 2014 wiring diagrams

www.jeeppatriot.com

And BTW, welcome!