Speedo keeps going on and off

[petefozzy]

Hi took out speedometer cleaned everything still the same just wondered if the speedo sensor could cause this and were is it located and any way of checking it or taking it out and cleaning it just to see if it made any difference if so would this be hard to do .
Thanks Pete

[CTScott]

Originally Posted by petefozzy

Hi took out speedometer cleaned everything still the same just wondered if the speedo sensor could cause this and were is it located and any way of checking it or taking it out and cleaning it just to see if it made any difference if so would this be hard to do .
Thanks Pete

When the speedometer stops working, does the speedometer display go completely blank (and does the separate odometer display also go blank)?

[petefozzy]

Yes it does and so does the fuel Gauge but other things like left and right turn work and temperature airbag light all work.
thanks

[CTScott]

Originally Posted by petefozzy

Yes it does and so does the fuel Gauge but other things like left and right turn work and temperature airbag light all work.
thanks

The indicator lights are driven by separate circuits. There are three circuits that feed the electronics for the speedometer, odometer, fuel gauge. The Ignition switch, the 15A ACC fuse and the 10A Gauge fuse supply the power to those functions, so I would check the brown wire in pin 1 of connector C13, the grey wire in pin 19 of Connector C15 and the red wire with the blue stripe in pin 8 of connector C13.

All three of those should have 12 Volts on them. if one does not, when the speedometer is not working, then that particular feed is the issue (for example it could be that the ACC relay contacts are not closing properly if the grey wire does not have 12 Volts on it).

1999 - cluster C13.jpg

1999 - cluster C15.jpg