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Progressive signal failure (?) 200

'88 240 DL
157K mi

Driver' side,
parking light not working,
predominant signal failure (rapid blinking when not working).
---
Cleaned the ground contact.
Both bulbs confirmed good.

Bulb failure light?
So is the bulb failure warning light not coming on because there is/was some current moving through the bulb(s) but not enough to turn them on?
------
I traced the front light assembly failures to the cable connector.
I fiddled with the harness connector until everything worked.

While sitting at a stop light with the left signal on I heard a buzzing/ratcheting sound coming from the drivers side under the dash.
The sound diminished until it faded out and I lost ALL signals. The parking lights all around are fine.

I first thought it was the flasher relay but the hazards still work.

I guess this moves me to the turn signal stem switch (?). That would be in the direction the ratcheting noise came from.

Any speculations on if this is a result of the shorting in the harness connector or just a coincidental?

Thanks








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    Signal failure (?) - flummoxed - everything now works? 200

    I pulled the plastic off the steering column and tested the signal switch.

    I got 5 volts for the feed to both left and right signal.

    I reattached the wires and now everything works like it is supposed to - signals, hazard and parking lights.

    (?) What's failing here?

    The only clue I see is that all the male ends of the wire connections on the switch look a bit burnt AND the terminal on the male end of the flasher relay that feeds to the switch is too.








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    Progressive signal failure (?) 200

    Pick up a flasher relay from the junkyard, replace the one above and to the right of the driver's foot. Small black cube, 3 prong if I remember correctly? If it does not fix you have a spare for the glove box.







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