First, thanks Steve for your suggestion. It turns out that the turn signals for front and rear are routed separately from the turn signal switch. It has to do with separating the brake and turn circuits. I didn't see this until I made a copy of the wiring diagram that I could highlight on.
I can guess that a new switch will be expensive, so I will try to clean the contacts.
Jay
>
>Jay hidy wrote:
>
>> Suddenly the right rear turn signal on my 72 240Z mostly stopped
>> working. The front TS is OK. RR Brake light and emergency flasher
>> all work. The 2-pin flasher doesn't click loudly when the right TS
>> is on like it does with the left.
>>
>>
>
>Just a guess but could be related to the emergency flasher switch.
>Everything goes through it. Also seen lots of problems with the turn signal
>switch and internal corrosion but that should affect both front and rear.
>Never seen this problem.
>
>--
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> Steve
>
>formatting link