Bushmaster6
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- the Springs
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and I think I'm probably on a path to changing the turn signal switch as well (feels like it may be broken inside) a good DIY video here

Yes, the front turn signals ground at the grill. You might have to remove a little paint behind each grill mounted light, so the metal light housing will ground to bare metal grill. I usually scrape some paint off right around a screw hole on each turn signal. Also, I will run a Dremel wire brush inside the grill turn signals where the bulbs plug in.Hope you all are well. After another 6 months of distraction... I'm back at it (again) and attacking the litany of smaller projects this rig needs with an emphasis on those necessary to simply make it safe to drive, of which lighting (brake, directionals) are near the top.
Symptom: in the array of front amber markers/signals (one each on front fenders and two on grill), only the DS marker illuminates, and it will go "bright" if I hold the directional in that direction, I get now light or directional on the PS except that the PS rear taillight will blink. DS tailight does not blink.
- I visually checked the main grounds in the engine compartment (battery negative to block, and two more that I could find touching the firewall)
- if I extract both the grill amber light bulbs, then both the front fender marker lights illuminate and both taillight directionals work, when I replace the bulbs the fender markers go out; my understanding is that each (grill and fender) is the ground for the other but I'm not sure "how" they do that and clearly the grill ambers are not grounding for the fender lights but rather shorting out that circuit
- The bulbs themselves appear to be good (filaments intact)
- using a multimeter I've tested for power to the two posts in the grill light sockets and get just under 12 volts on one and about half that on the other (guessing this is low voltage for marker light and higher voltage for the directional)?
- I think the bulbs ground via the two locking pins in the light socket, and I've cleaned the socket area and the bulb pins/metal parts with a wire brush
- do the grill light assemblies (the cup behind the lens) provide ground to the body via the two mounting screws?
Raymond, good to hear from you and thanks for responding. It took me awhile to put 2 and 2 together but I finally figured out that was my problem and did much as you described. I was mistakenly checking for continuity on the positive terminals and hadn't tested for ground. When I screwed the buckets back in I tested correctly and got continuity at the screws, but not in the bucket/light socket so I wire-brushed the back of the bucket and dremel-ed the socket. That helped a lot... my one oddity now is that the PS light goes full on (both filaments) at parking lights and then has no directional or flasher. I've ordered replacement running lights (a pair) this evening because these old ones were pretty raggedy anyway so, it may just be the wiring harness into the light bucket. Also ordered a turn signal switch because mine won't hold a direction (suspect that white plastic bit is broken). Another oddity (but good) was that the taillight would flash even though the front light would not but, different circuit. After I get all this working, looking into LED replacements and some H4 headlights.Yes, the front turn signals ground at the grill. You might have to remove a little paint behind each grill mounted light, so the metal light housing will ground to bare metal grill. I usually scrape some paint off right around a screw hole on each turn signal. Also, I will run a Dremel wire brush inside the grill turn signals where the bulbs plug in.
You might have to scrape some paint behind the tail lights, too.
Raymond, good to hear from you and thanks for responding. It took me awhile to put 2 and 2 together but I finally figured out that was my problem and did much as you described. I was mistakenly checking for continuity on the positive terminals and hadn't tested for ground. When I screwed the buckets back in I tested correctly and got continuity at the screws, but not in the bucket/light socket so I wire-brushed the back of the bucket and dremel-ed the socket. That helped a lot... my one oddity now is that the PS light goes full on (both filaments) at parking lights and then has no directional or flasher. I've ordered replacement running lights (a pair) this evening because these old ones were pretty raggedy anyway so, it may just be the wiring harness into the light bucket. Also ordered a turn signal switch because mine won't hold a direction (suspect that white plastic bit is broken). Another oddity (but good) was that the taillight would flash even though the front light would not but, different circuit. After I get all this working, looking into LED replacements and some H4 headlights.
TL/DR: have continued troubleshooting and even replaced the lights and now have 3 corners working signals (both tails and DS front) but only parking lights on the PS front, no signal.Pull the bulb out of the offending socket and use a test light and see if it flashes, maybe just a bad bulb?
