Hi,
I wonder if you guys know where the sensors are for the rev' counter.
In normal weather the counter is dead. In very cold weather the counter works just fine untill the engine comes upto temp then it dies.
It may be a fault in the ECM but is there an out board sensor for rev's.
Any help or ideas much appreciated.
Doug
Rev' counter has a thermal fault
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Check the ellectrics schedule on mr. dragons' site, check for the rev counters wires., find them in your car and inspect.
maybe a rev counter wire is of the very britlle speedo cable type... (shielded). if so, make new cable connection
I also have repaired some clocks', open the clockhouse, inspect the print at the inside, lots of 480 have hair cracks, especially in the welding of the connector pinns. Its all about connections. sensors failure is not that common
Alos seen a speedo clock with a messy , oxidated spot on the print I have cleaned them succesfully with a (tooth) brush and contactspray... prints can take more than you think.
maybe a rev counter wire is of the very britlle speedo cable type... (shielded). if so, make new cable connection
I also have repaired some clocks', open the clockhouse, inspect the print at the inside, lots of 480 have hair cracks, especially in the welding of the connector pinns. Its all about connections. sensors failure is not that common
Alos seen a speedo clock with a messy , oxidated spot on the print I have cleaned them succesfully with a (tooth) brush and contactspray... prints can take more than you think.
luck,
JPF
Nomen est Omen
JPF
Nomen est Omen
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oxidated spot on the print I have cleaned them succesfully with a (tooth) brush and contactspray... prints can take more than you think.
Well this might be good reason, the speedometer of my car doesn't work very well in cold rainy wether. When I hit the dashboard, (not to hard it hurts) it start to work fine.
Arnold
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Dark Gey Metalic
Became a dashboard hero.
Volvo 480 Club EUROPE - www.volvo-480-europe.org
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- 480 Newbie
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Thanks for the advice
Hi chaps,
I have th wiring schematic but have not managed to trace it all through yet but hopefully that will give me a clue.
Not sure about it being the PCB at the back of the rev' counter as damp seems to play no part it has to be sub zero outside to make it work. once the engine warms up it stops working again.
I will have a close look at the schematic on my next day off.
Best regards
Doug
I have th wiring schematic but have not managed to trace it all through yet but hopefully that will give me a clue.
Not sure about it being the PCB at the back of the rev' counter as damp seems to play no part it has to be sub zero outside to make it work. once the engine warms up it stops working again.
I will have a close look at the schematic on my next day off.
Best regards
Doug