Before writing this I scoured Comanche Club to see if any MJ owners have had this same issue. After much searching I've found some posts with similar problems, but not exact matches.
In my instrument cluster, the LEFT Turn Signal Indicator sometimes works (and) sometimes it doesn't. It's quite finicky and annoying to not see blinking. Probably 40% of the time it illuminates, while 60% it remains dark.
- Replaced both front end Turn Signal sockets & bulbs
- Replaced both front end Side Marker sockets & bulbs
- Replaced every bulb in the Tail Lights
- Turn signal Flasher is NEW
- All exterior lights function properly
- All fuses are NEW and none are blown
- TURN B/U fuse terminals feel nice and tight
- Cleaned the fuse block with QD® Electronic Cleaner & Canned Air
Nearly every Tail Light socket had serious corrosion (the old front Turn Signals did as well). Had to use precision pliers, PB Blaster and a heat gun to work out each of the broken bulbs. Was a real mess. All exterior bulbs now have dialectic grease.
Below is what I thought of doing to get the indicator working properly:
• Clean up instrument panel ground below the dash
• Remove instrument cluster to clean and/or replace blinker light sockets & bulbs
• Separate and clean out that wire connector behind the driver's headlight
Am I on the right track to resolve this issue? Or would you guys recommend trying something else?
Thanks Eaglescout for the note. I'll report back on the results when I do this project soon. I didn't know that plug behind the left headlight isn't weatherproof. That makes since why attention to the plug is so often mentioned for various electrical issues. I have reviewed Cruiser's Tips a few times. It's quite a good write up for people like me who don't have any real experience working on vehicles. I bought my Comanche in August of 2021 and am slowing working out the problem areas. It's awesome that a resource like Comanche Club is dedicated solely to these older trucks. Glad it's around.