1 GPI troubleshooting. Fri Apr 06, 2018 2:50 am
George_Pap
Silver member
Hey all.
My K100RT was bricked for over 7 years till a couple of months ago.
When got it up running the LCD display on the instrument cluster was displaying 4 with the bike in Neutral. Also the N(eutral) light was off.
After reading and studying i decided to get a secondhand one from Motorwoks.uk and passed it to my mechanic to replace it since i was affraid to dare removing the swingarm at my backyard prior replacement.
Mechanic did the swap (he had to change the plug, mine was the early transparent one, the sensor had the black one) and informed me that it worked so made me happy.
After a couple of days went to get the bike from the mechanics garage.
Sensor was not working at all.
Not even displaying anything on the LCD screen. Totally blank, no Green Light ever.
So i started the troubleshooting myself.
Removed the 4 cables of the plug ( to the instrument direction )
tried several combinations of grounding the cables each to other and got Green Light (N) and all of the gear numbers displayed on the instruments LCD.
Next step was to mess with the other plug, the one to the GPI switch (the one the mechanic had replaced) He actually did no cuts, he just pulled the pins out of the old transparent and installed em into the new plug.
Found out that the Yellow white one was unsoldered from the pin. Thought that this was the problem. So in draft mode i put the 4 stripped cables of the GPI switch side to the 4 cables of the instrument cluster side.
Blank again. Nothing.
While messing with the cables i sensed excessive temperature in my fingers from the cables. Smelled something burnt.
After that moment, no clock with the ignition switch off ofcourse.
Any ideas on how to solve this out? Maybe something to take into account is the old alarm system removal (non BMW alarm) from an electrician in the meanwhile.
I have ordered another used GPI from Motorworks and and a a fully working instrument cluster too.. But i need to make sure that there is no electrical problem before installing them
My K100RT was bricked for over 7 years till a couple of months ago.
When got it up running the LCD display on the instrument cluster was displaying 4 with the bike in Neutral. Also the N(eutral) light was off.
After reading and studying i decided to get a secondhand one from Motorwoks.uk and passed it to my mechanic to replace it since i was affraid to dare removing the swingarm at my backyard prior replacement.
Mechanic did the swap (he had to change the plug, mine was the early transparent one, the sensor had the black one) and informed me that it worked so made me happy.
After a couple of days went to get the bike from the mechanics garage.
Sensor was not working at all.
Not even displaying anything on the LCD screen. Totally blank, no Green Light ever.
So i started the troubleshooting myself.
Removed the 4 cables of the plug ( to the instrument direction )
tried several combinations of grounding the cables each to other and got Green Light (N) and all of the gear numbers displayed on the instruments LCD.
Next step was to mess with the other plug, the one to the GPI switch (the one the mechanic had replaced) He actually did no cuts, he just pulled the pins out of the old transparent and installed em into the new plug.
Found out that the Yellow white one was unsoldered from the pin. Thought that this was the problem. So in draft mode i put the 4 stripped cables of the GPI switch side to the 4 cables of the instrument cluster side.
Blank again. Nothing.
While messing with the cables i sensed excessive temperature in my fingers from the cables. Smelled something burnt.
After that moment, no clock with the ignition switch off ofcourse.
Any ideas on how to solve this out? Maybe something to take into account is the old alarm system removal (non BMW alarm) from an electrician in the meanwhile.
I have ordered another used GPI from Motorworks and and a a fully working instrument cluster too.. But i need to make sure that there is no electrical problem before installing them
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K100RT (Early 1985 -nonABS)