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[aaronjb]

It would make sense if switching TC off also disabled cruise control. The fact that someone has previously removed the cruise stalk makes me suspect that there is a short circuit (perhaps intermittent) in the wires to the cruise switches which is setting cruise when it is not wanted

That's where my money would be.. Cruise is effectively 'stuck on'. Although I never tried the TC button with the cruise enabled to see if it also disabled cruise. Anyone with cruise able to test that for the OP?

To the OP: If you brake do the revs also drop? (As we know the clutch and brake should both disable cruise)

[05omegav6]

It would make sense if switching TC off also disabled cruise control. The fact that someone has previously removed the cruise stalk makes me suspect that there is a short circuit (perhaps intermittent) in the wires to the cruise switches which is setting cruise when it is not wanted

That's where my money would be.. Cruise is effectively 'stuck on'. Although I never tried the TC button with the cruise enabled to see if it also disabled cruise. Anyone with cruise able to test that for the OP?

To the OP: If you brake do the revs also drop? (As we know the clutch and brake should both disable cruise)

Will try that later Whilst drifting around Asda car park on my way home...

[aaronjb]

  Now I know how you bent that wishbone, Al. Your secret is out!

[STEMO]

It sounds to me as if TC is switching cruise on off. Either an electrical fault..or a Terbs fault.

[Kevin Wood]

TC wiring is often butchered on plod cars, so makes me wonder if that's somehow been confused with cruise wiring on replacement?

On a DBW system, throttle movement and pedal movement are monitored by 2 separate systems on each. If the throttle is remaining open when the pedal is released, it's because the ECU is doing it deliberately for some reason, otherwise it would revert to limp mode and log a fault code.

Something is triggering the cruise control, IMHO. Even more likely as the cruise stalk has been removed and there could be cruise wiring floating around behind the dash shorting to something.

[05omegav6]

Cruise switch wouldn't have originally been present... Could potentially be a dash out job to find the short between the cruise and Tc looms...

Mine had cuts on the brake switch loom, handbrake loom and two additional feeds for the ignition switch for the runlock, and cuts in the TC loom to the switch...

[Andy H]

Cruise switch wouldn't have originally been present... Could potentially be a dash out job to find the short between the cruise and Tc looms...

Mine had cuts on the brake switch loom, handbrake loom and two additional feeds for the ignition switch for the runlock, and cuts in the TC loom to the switch...

Would the run-lock only maintain a normal idle? or could it be used to set a fast idle to spin the alternator fast enough to drive all the flashing lights?

[Lazydocker]

Cruise switch wouldn't have originally been present... Could potentially be a dash out job to find the short between the cruise and Tc looms...

Mine had cuts on the brake switch loom, handbrake loom and two additional feeds for the ignition switch for the runlock, and cuts in the TC loom to the switch...

Would the run-lock only maintain a normal idle? or could it be used to set a fast idle to spin the alternator fast enough to drive all the flashing lights?

Normal idle only... Not a PTO

[C20det]

I did get a throttle position /switch circuit malfunction code & I erased it hasn't returned. The only other codes I'm getting is the 02 Sensor heater circuit open (bank 1 sensor 1) & bank 2 sensor 1

Codes

0135-4
0135-8
0130-4
0150-4

Intermittent

Witch I still can't get to the bottom off