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Old 24th June 2018, 21:48   #11
genpk
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Could be some of the ribbon cable in the steering rotary coupler have gone.
Mine did a similar thing and i found one of the 7 wires was faulty.
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Old 24th June 2018, 21:53   #12
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Quote:
Originally Posted by genpk View Post
Could be some of the ribbon cable in the steering rotary coupler have gone.
Mine did a similar thing and i found one of the 7 wires was faulty.
This can be tested while on the T4 screen above, toggle all of the inputs, set , resume and the brake pedal, the input states will change on screen

Brian
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Old 25th June 2018, 08:13   #13
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The only inputs that registered on the live test screen was brake and brake light. The cruise control inputs remained the same, what does this indicate?
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Old 25th June 2018, 09:05   #14
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As mentioned previously, it may be that the rotary coupler has one or more open circuit wires.

Do the horn buttons work? If not then check the earth header C0552 is clean and is making good contacts.

It sits behind the trim panel in front of the drivers door near the bottom edge, and is the third header up from the lowest one.









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Old 25th June 2018, 09:12   #15
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Ah, horn not working!
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Old 25th June 2018, 09:17   #16
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If the earth header is OK (the horn and cruise switches share a common earth wire) then chances are you need a new rotary coupler.

Not a difficult job, but you need to ensure that both the coupler and steering wheel (and the road wheels!) are central when it is fitted, or they don't tend to last very long.











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Old 25th June 2018, 10:35   #17
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Make sure the coupler dosnt unwind also whilst installing it!!
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Old 25th June 2018, 10:37   #18
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Quote:
Originally Posted by marinabrian View Post
This can be tested while on the T4 screen above, toggle all of the inputs, set , resume and the brake pedal, the input states will change on screen

Brian

Oh for a t4 over here !!
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Old 25th June 2018, 14:36   #19
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Yep he sure is a lucky chap.
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Old 26th June 2018, 13:04   #20
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Quote:
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Oh for a t4 over here !!
phil-T4 does one for £150 does he not ?

And the cruise control on a diesel automatic is rubbish, rubbishier than rubbish, it should never have been. it just revs its nuts off to try to get up to speed, or keep it's prgrammed speed, it is terrible.

Pete.
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