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Easy and cheap TD5 Defender cruise control


ashtrans

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When I clicked the link within that thread you linked to, I got this:

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- www.radiosunlight.de -

and then it takes you to http://87.114.128.152/ after asking for my login details for my router!

seems dodgy to me - I never have anything on my pc that is dodgy. I run a firewall & antivirus software.

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Don't click the german link, just scroll down and all will be explained. To save you the effort I've pasted the worthwhile repsonse here...

"ok ok, I will translate it for you:

The plug on top is the black plug on the ECU under the seat.

The pins on the ECU will be connected the following way:

Pin 10 - ignition +12V

Pin 11 - switch 1 (set function)

Pin 15 - ignition +12V

Pin 17 - switch 2 (resume function)

Pin 19 - is only mentioned, that you can connect here the available TD5 tachometer, not used for the cruise control

So the cruise control works by supplying ignition +12V to pin 10/15 permanently and the functions are activated by supplying the same temporary to pin 11 or 17.

For getting the ignition switched +12V (Zuendplus Klemme 15), if I remember correctly, when I had last time my dash off, use the green/white cable at the temperature or fuel gauge in the dash. Put two switches on the dash and run a long cable to the ECU.

More clear now? It works on my TD5
biggrin.gif
but no guarantee
wasntme.gif

browny"

Cheers

Steve

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Gotta say cruise control was the best mod I have done on my TDi Disco. Bit more complex than a Td5, but parts seem to be common between lots of cars - I used parts from a Saab, Volvo, Jag, and LR. Makes it sooo easy to drive on long trips.

And no smart comments about using a brick! Quite happily hit 100 thanks very much...

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The pins on the ECU will be connected the following way:

Pin 10 - ignition +12V

Pin 11 - switch 1 (set function)

Pin 15 - ignition +12V

Pin 17 - switch 2 (resume function)

Based on my "research" on the rave-CD of a TD5-disco (which uses the same ECU as a TD5-Defender) from 2002 onwards; Pin 10 is the input signal for the brake contact and - therefore - should NOT be put permanently on 12V.

Pin 15 (activation cruise control) can be wired via an ignition +12V but it is far better to put an on-off switch in-between.

One of these days; I'll test the circuit on my TD5 defender to see confirmed (I hope) my statement that pin 10 should not be wired to ignition +12V.

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I did read somewhere that there was a problem with doing this - something about only working in 4th gear.

That said, these guys don't seem to have had that problem.

If its the same one I'm thinking about....

I think they had the same problem as the bloke with the GKN overdrive in the Australian Thread.

From what I gather, the kit works OK with standard gearing, but if you fit an overdrive, or a Disco transfer box (i.e. the 1.222:1 gears) etc etc then you start having problems.

Ian

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Based on my "research" on the rave-CD of a TD5-disco (which uses the same ECU as a TD5-Defender) from 2002 onwards; Pin 10 is the input signal for the brake contact and - therefore - should NOT be put permanently on 12V.

Pin 15 (activation cruise control) can be wired via an ignition +12V but it is far better to put an on-off switch in-between.

One of these days; I'll test the circuit on my TD5 defender to see confirmed (I hope) my statement that pin 10 should not be wired to ignition +12V.

Although it is the same ECU... the coding (i.e. the fuelling and variant files) are different...

Looking at the wiring diagram for a 2002 Defender pin 10 is not used in a Defender application.

Ian

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Although it is the same ECU... the coding (i.e. the fuelling and variant files) are different...

Looking at the wiring diagram for a 2002 Defender pin 10 is not used in a Defender application.

Ian

So you reackon this would work then Ian?

A mate has asked me to have a look at fitting it for him - I was going to give you a ring to check before I had a go.

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  • 4 weeks later...

my mate, who posted the circuit diagram on the german forum, has sold and fitted loads of these cruisecontrols to td5's. and i think he only ever had 2 comebacks were he had to help with his rovacom.

i got the loom lying here but havent gotten round to fitting it to mine yet.

i can get in touch with him and bring some ready made kits ,including the harness and switches over.

JJ

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Guest diesel_jim
I have not done it yet but I do plan to. I need to find some suitable switches...

Chris

The old 2 spoke style rangie steering wheel fits the defender splines, and some of those had the cruise switches mounted in the middle bit of the wheel (well, dad's old rangie did :unsure: )

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  • 3 months later...

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