Join Date: 02-24-2008
Location: N'ards Northern Ireland, UK
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RRX Speedo Corrosion pic
My speedo stopped working on my UK model 1999 RRX. I've been working through the haynes manual procedures, but have one last test to do once I rig tiny prongs for my multimeter to test the speedo cluster connector, while spinning the rear wheel to check for a flucuating current. the guide says if no current detected the speedo is broken.
but anyway I took the instrument cluster off and noted blue fur corosion visible, so I took the clocks apart and found 6 wire connectors, which I beleive run to the speedo area on the board, had the blue fur corosion. I cleaned with contact cleaner , and they look fine, no cracks in solder seen. went for test ride hoping it would work again, but no, not working.
my question is, ( from the pic) would the blue fur ( copper sulphate I believe) have caused a short and blown something on the circuit board.
Ive still to rule out the speed sensor, but with the corrosion my guess is thats the problem. has anyone experience of this corrosion breaking pcb's even when looking normal after cleaning? before and after pics attached.