XJS ( X27 ) 1975 - 1996 3.6 4.0 5.3 6.0

Speedo gone bad?

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Old 06-20-2009, 01:14 PM
derby98's Avatar
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Default Speedo gone bad?

On my 90 XJS the speedo works intermittently, is the speedo going out or is it likely something else?
 
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Old 06-30-2009, 07:12 PM
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Don't look for the sensor on the transmission. Around mid-88 the sensor was moved to the differential. The signal then goes to an interface unit in the trunk/boot, then to the speedo.

Cleaning connections is always a good place to start when ironing out Jag electrical problems....or any electrical problems, for that matter.

Also, the printed circuit on the back of the instrument cluster can cause trouble from dirty contacts or lack of grounding

Cheers
DD
 
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