Thread: CDL install - last battle (hopefully)

I don’t get CDL light on starting up, do other people? If so maybe sensor and globe.

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That warning light warning doesnt have self test, it comes on only on CDL switch command.... and it's not globe but SMD LED, i've never seen one failed on it's own

Originally Posted by sierrafery

That warning light warning doesnt have self test, it comes on only on CDL switch command.... and it's not globe but SMD LED, i've never seen one failed on it's own

Great that saves me ripping the dash out. Sensor it is. Do you have a part number by any chance Sierra? Not seeing much when searching using C0306.

You should check the circuit before ordering the sensor cos maybe you'll find just an unplugged connector or the light to not work with bridged plugs then it's not the switch... anyway if the transfer box is the original one p/n of the switch is PRC2911

Just a thought. If the CDL wasn't a specified factory fitment would LR have even fitted the light/LED?


Seen so often with electrical plugs not going anywhere but just hanging there.



Just sayin.

My 2002 bulb lights up if I follow the correct sequence of start then lock or is it lock then start?

But I had to connect to the BCM by joining wires at the rear of the console near the power steering switches..

Regards Philip A

The warning light is there on all just that some 2001+ modells dont have the wiring between the console and switch but that's doable

Just getting back to this after multiple disctrations both good (holiday) and not so good (clutch slave)... I have the CDL link installed but no light coming up, either sensor or dog clutch not engaging. Been for a couple of drives but can't 100% tell based on feel

Originally Posted by Markf

You can test it all by putting the gearbox in neutral with the handbrake on. Chock one front wheel and jack the other one up. With the diff lock disengaged the jacked up wheel should turn freely. With the diff lock engaged the wheel will turn a bit until it engages at which point the light should come on with the ignition on. To disengage the diff lock disengage it at the lever and turn the jacked up wheel a bit in both directions until it turns freely at that stage the light should go out.

Does this stand true for a constant 4wd rather than part-time though Mark? If all wheels are constantly engaged why would front spin free? I did try this while out driving and no difference in wheel spin between CDL or not, or between front and back wheels with the CDL off. Just 5cm or so of free movement all round.

If anyone can give me a step by step on 'bridging' the sensor that would be great, I'm an electrical dummy. I do know where to find it though.

And if there's any other mechanical tests to confirm if the CDL is engaged (other than feeling for steering tightness and scuff marks on the track when I turn tightly) that would be v helpful too!

Cheers, Will