02-03-2009, 02:31 PM
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#1
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Registered Member
Join Date: May 2007
Posts: 463
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Quote:
Originally Posted by MakDiesel
Quick Q, what would cause the upshift green arrow to spas out sometimes and flicker when accelerating kinda slow before deciding to say "yes, please shift" w/ a solid green light?
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It's entirely up to the ECU to decide when to light the upshift indicator. There is a circuit board on the back of the gauge cluster that does the grunt work of actually applying power to the bulb and dimming it when the headlights are on, but it's a dumb circuit - it just responds to on/off signals from the ECU and parking lights.
If the light is behaving erratically, I would check the wiring between the ECU and gauge cluster connectors, and the connections on the back of the gauge cluster it self. If everything checks out in that respect, I would check the power supply and ground to the gauge cluster and ECU, then the possibility of a bad ECU.
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