As for your blinker, The fender does not blink, It's just a side marker lamp. When I started on mine here's what I did, Since they are all on the same circuit off the fuse block you can rule out the fuse.
1. Check your bulbs, A Volt OHM Meter is going to be your friend. If you can't visibly verify the bulb you can either OHM it out, or swap it out with the other side.
2. Check for voltage at the socket using both the socket and a known good ground +/- 13v. If you have voltage, trace down the ground, could be the fixture, could be the groundwire at the tub. just above the headlight relay to the left of the drivers side headlight. Sand down all surfaces with an emery board or cloth, reassemble with Di-Electric grease.
3. If that doesn't solve it, There's a link at the bottom of my signature that has FSM's for almost all the years, Pick the one for your year and you'll have access to diagnostic flowcharts and wiring diagrams.
If all else fails, check the wiring terminal block on the inside firewall just behind the washer fluid tank. The wire for the marker/turn signal on both sides goes through there. I have found corroded terminals in this area to be an issue.
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