Weird electric issue (help?)

[Howie]

I've been busy all day, so I didn't get a chance to look at anything.  Your readings tell me your blinkers should not be working at all.  Yes,

The fast flashing rear is just a result of a malfunctioning same-side signal, no?

would usually be correct.  I have 0 knowledge what goes on inside the chip inside the instrument cluster.  A PM to suzyj might help

[suzyj]

Thanks for the PM.

There is some ungoodness happening. Your double-rate flashing is because the driver sees a blown bulb (= no or low current)on one of it's outputs. This may be a broken wire, which I foubt as then you'd see 0V on the front right indicator output, it might be a dodgy connector at the indicator or cluster, or it may be a damaged output FET on the driver chip in your cluster.

See https://ducatimonsterforum.org/index.php?topic=56614.msg1166122#msg1166122 for what's in your instrument cluster.

I think the next step is to open that up and have a look. They are very badly sealed so it's likely water has gotten in.

To stop the double rate flashing with a damaged chip you can disable the current monitoring, as I did to make it work with LEDs by cutting a couple of pins off the driver chip.

However this still isn't right, as the current from both bulbs is now being sourced from one FET in the chip, potentially stuffing it. If you swap to LED indicators this would be okay.

[stopintime]

Thank You

I remember your instrument surgery very well. Curious, but never performed it myself.

One of the three tested instruments is new. The other two never showed signs of bad humidity damage. The results are the same on all three.

I find it very strange that all my "by/out of the instrument" tests show 6-7 volts on the front right wires. Shouldn't those measurements be unaffected? Or are they affected by harness issues?

What do you think about my strange continuity test? Harness issues?

[stopintime]

My meter. Are the wires connected wrong, maybe?

[Howie]

Leads are correct.

[GreasySnipe]

I used to find something like this, the filament was broken in one of the bulbs and caused the relay to switch fast. a short to ground such as a broken filament falling down on another would do this especially if your harness goes back to a Body control module where it might have individual transistors instead of those old large ice cube relays.

[stopintime]

Decided to leave the harness more or less alone. Double checked that I had continuity through the instrument plug before I and a friend cut the wire a few inches from the plug. New piece of wire down to the turn signal did it. "Keep it simple"? Works!

 

Thanks for the support

[Howie]

Yay!

[koko64]