Well if it is just the right front, what does the dash right turn arrow do? Does it flash reliably/consistently when commanded?
what happens when you turn on the hazard flasher switch?
I said the fronts were pretty straightforward. The signal goes from the flasher to the hazard switch Input. It branches off there to the steering column switch. The output of the hazard sw also goes to the steering column switch but to a different set of contacts. When you select the right turn signal, the TS switch sends the signal to TB1 pin 43. TB1 is used for DC distribution so many of the pin sets are tied together in groups. In this case pin 43 is tied to 41 and 42. One of those feeds the right dash turn arrow, the other feeds down to the right front turn signal lamp via and intermediary bumper connector pair P/J27.
If only the front right turn signal lamp in the bumper is acting wonky, the issue is probably in the wiring between TB1-42 and the lamp itself. That lamp assembly is also tied over to a common ground point(forget where it is bolted to on the structure) so that could also be the issue. Could be as simple as a bad bulb or socket inside the housing…
if both the bumper light and the arrow in the dash panel are acting weird, it could be the right TS switch contacts in the steering column sw.
What does it do with the hazard sw turned on and TS switch in the middle? The hazard signal runs thru different contacts in the TS switch.
some things to look at
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