As usual I went four wheeling today and came back with an issue. Went through some deep streams and mud pits... got home and turned off ignition and truck wont start back up. Now it seems to be a starter issue because when i turn the key it doesnt click or anything and the ebrake light dims. Ive had this happen before after wheeling in similar conditions but I just hit the starter with a hammer a few times and it started back up. Ive hit the starter with a hammer this time to no avail...
The last time the hammer trick worked my truck had been sitting a few days so it had time to dry. Maybe I just need to wait?
Also since the rain started and ive been wheeling everyday the radio has started to short out while driving... fresh installed stereo, no problems until going through deep water. the 4wd light was flickering as well. Is this a grounding problem?
I found this but Im guessing it hasnt connected for awhile. could this be related...
wire goes to ignition

Starters pretty dirty
Where do I begin in diagnosing the starter?
Thanks for help in advance
The last time the hammer trick worked my truck had been sitting a few days so it had time to dry. Maybe I just need to wait?
Also since the rain started and ive been wheeling everyday the radio has started to short out while driving... fresh installed stereo, no problems until going through deep water. the 4wd light was flickering as well. Is this a grounding problem?
I found this but Im guessing it hasnt connected for awhile. could this be related...

wire goes to ignition


Starters pretty dirty

Where do I begin in diagnosing the starter?
Thanks for help in advance