Speedometer short? or something else
#1
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So the "Anti-Lock" and "Brake" lights have been on for a while (still getting around to diagnosing those problems) but I have been chasing an intermittent speedometer reading for a few weeks now. I have pulled the cluster out and cleaned the contacts and leads so everything has a good connection. Everything was working for about a week then this evening while driving the Speedometer would go dead, then wake back up, then go dead and wake back up, finally going off all together. However, I just noticed that the "Anti-Lock" and "Brake" instrument lights would both go out when the speedometer would drop off, then illuminate when the speedometer came back online.
Is this a short in the cluster, something to do with a speedometer sensor, or something different all together?
Any input would be much appreciated.
1992 XJS V12
Is this a short in the cluster, something to do with a speedometer sensor, or something different all together?
Any input would be much appreciated.
1992 XJS V12
#2
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Hi Sd
Sounds like you've got a bad earth and if so its not unusual to rig up a supplementary earth behind the Instrument Cluster
Though do make sure that all the Pins on those Multiplug Plugs and Sockets are absolutely clean with no corrosion in sight whatsoever, as this is one of the major reasons for the Speedo to intermittently fail as it has on your Car
'Grant' advises 'Lemon Juice' for this sort of thing, which can be applied with a 'Cotton Bud' and that was one of the things that worked for me and also be very careful not to damage the Printed Circuit, or that could be a very tricky problem to sort out
Sounds like you've got a bad earth and if so its not unusual to rig up a supplementary earth behind the Instrument Cluster
Though do make sure that all the Pins on those Multiplug Plugs and Sockets are absolutely clean with no corrosion in sight whatsoever, as this is one of the major reasons for the Speedo to intermittently fail as it has on your Car
'Grant' advises 'Lemon Juice' for this sort of thing, which can be applied with a 'Cotton Bud' and that was one of the things that worked for me and also be very careful not to damage the Printed Circuit, or that could be a very tricky problem to sort out
#3
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