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Old 06-23-2014, 08:49 AM   #1
swanker OP
Shadetree Tinkerer
Joined: Jul 2012
Location: Columbus, Ohio
Oddometer: 131
Question Turn Signal stops blinking after warming up

My OEM relay went out on my '78 R100 and didnt' want to drop $90 for a new one from bmw so found on here that you can use the Tridon 550 old school 3 prong auto signal relay.
I got the 552 (package said it was an upgrade to the 550 and interchangeable).
I got a relay socket and spades and wired it up.
Signals worked just great.
After about 10 minutes of riding the signals would no longer flash.
I noticed that the green turn signal indicator was on.
This morning all good, they flashed just fine but exhibited the same behavior after about 5 minutes of riding.

Any ideas what could be going on?
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Old 06-23-2014, 04:06 PM   #2
Joined: Aug 2012
Oddometer: 1,558
Probably the relay.

If within warranty period then more probability that it is the relay.

Checks? For other possibilities
battery voltage (at start up and after the 10 minutes)
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Old 06-24-2014, 05:59 AM   #3
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Joined: Jul 2009
Location: USA
Oddometer: 2,281
With mine it was the switch- dirty(perhaps corroded?) contacts; a spray of electrical cleaner seemed to help.
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