Retrofit cruise control

ShaunB · 4th May 2020, 19:57

So I've finally got round to connecting all the wires on my retrofit cdti without factory loom,I'm confident I've got all the connections ok and the brake and clutch switches are good but the cruuse light on the ipk stays permanently on when the engine is started and the cruise switch only flashes green briefly when pressed someting is wrong somewhere just wondering if anyone else has had this ,can the cruise ecu fail ?

marinabrian · 4th May 2020, 20:52

I have not encountered a faulty diesel cruise ecu to date, I would carefully recheck your wiring is correct

The wiring diagram I've attached for you

Best of luck

Brian

Steven211 · 5th May 2020, 04:53

Sounds like it needs t4 programming?

snowman · 5th May 2020, 06:40

When I fitted mine on my diesel it worked ok the only thing I needed a t4 was to enable the resume function every thing else was fine Brian slighted this for me
Regards paul

ShaunB · 5th May 2020, 12:56

Quote:

Originally Posted by marinabrian

I have not encountered a faulty diesel cruise ecu to date, I would carefully recheck your wiring is correct

The wiring diagram I've attached for you

Best of luck

Brian

Thanks for the info Brian, I’m going to double check the wiring bit worried about connecting it up again though in case it causes problems with the main ecu

Rick-sta · 5th May 2020, 14:05

sounds to me like you may have 2 wires the wrong way around. I'm assuming you used my how to guide for retroffiting cruise control here:https://www.the75andztclub.co.uk/for...d.php?t=228668

Have another thorough check of all the cable connections to ensure they're all connected to the right places. Having two cables the wrong way around can easily be missed. I'd start at the cruise master switch.

ShaunB · 7th May 2020, 21:40

Yes i followed your excellent guide but have now come to accept I've wired it wrong the light comes on even with the switch disconected,I'm gonna take a breather and try again thanks for the info folks

4th May 2020, 19:57	#1
ShaunB Regular poster MG ZT-T Join Date: Nov 2016 Location: Wolverton Posts: 90 Thanks: 14 Thanked 16 Times in 12 Posts	Retrofit cruise control So I've finally got round to connecting all the wires on my retrofit cdti without factory loom,I'm confident I've got all the connections ok and the brake and clutch switches are good but the cruuse light on the ipk stays permanently on when the engine is started and the cruise switch only flashes green briefly when pressed someting is wrong somewhere just wondering if anyone else has had this ,can the cruise ecu fail ?

5th May 2020, 14:05	#6
Rick-sta This is my second home MG ZT 2.0 CDTI+ in Typhoon, MG TF 135 in Typhoon & Rover 75 Connoisseur CDTI SE in Pearl Black Join Date: Oct 2012 Location: Norfolk Posts: 7,536 Thanks: 2,718 Thanked 2,827 Times in 1,462 Posts	sounds to me like you may have 2 wires the wrong way around. I'm assuming you used my how to guide for retroffiting cruise control here:https://www.the75andztclub.co.uk/for...d.php?t=228668 Have another thorough check of all the cable connections to ensure they're all connected to the right places. Having two cables the wrong way around can easily be missed. I'd start at the cruise master switch. __________________ How to retrofit Cruise Control on a diesel with no OEM wiring in place: Link How to retrofit heated electric memory seats with no OEM wiring in place: Link How to operate FBH and ATC via text Link How to restore cloudy projector headlights Link

5th May 2020, 04:53	#3
Steven211 Regular poster VW Golf TDI yawn Join Date: Jul 2019 Location: Worcester Posts: 83 Thanks: 21 Thanked 19 Times in 12 Posts	Sounds like it needs t4 programming?

5th May 2020, 06:40	#4
snowman Avid contributor rover 75 tourer Join Date: Nov 2010 Location: birmingham Posts: 123 Thanks: 107 Thanked 33 Times in 25 Posts	When I fitted mine on my diesel it worked ok the only thing I needed a t4 was to enable the resume function every thing else was fine Brian slighted this for me Regards paul

7th May 2020, 21:40	#7
ShaunB Regular poster MG ZT-T Join Date: Nov 2016 Location: Wolverton Posts: 90 Thanks: 14 Thanked 16 Times in 12 Posts	Yes i followed your excellent guide but have now come to accept I've wired it wrong the light comes on even with the switch disconected,I'm gonna take a breather and try again thanks for the info folks