Hello all

I am in the process of replacing my 1998 halogen headlamps with a pair of (working) HID lamps. I have got the wiring figured out and now understand how to connect the leveling function so that it works correctly. The next step is to make an analogue to PWM generator so that I can use the old beam adjuster knob on the middle console to manually adjust the beam height (I do not have the suspension mounted sensors).

Has anyone got any idea of what the PWM signal looks like. Ideally, I need a spec showing the duty cycle min/max and the voltages. The ballast and control units are called LAD5G.

Thanks
Mark

 

Welcome to the forum Mark,

Please follow this link New Member Area - Intro a MUST - Jaguar Forums - Jaguar Enthusiasts Forum to the New Member Area - Intro a MUST forum and post some info about yourself and your vehicle for all members to see. In return you'll get a proper welcome and some useful advice about posting to the forum.

Graham

 

Hello again

From what I can see, the stepper motor drives my dipped lights as far down as possible. I suspect that this may not be rectified by connecting the ride height sensor to the expected PWM signal (I am guessing that some kind of fault reset may also be required),

Another thought is to remove the stepper motor all together and to replace it with the servo motor from the halogen lights. I usually drive without any real load and if I did, it would be possible to adjust manually.

Anyone know how to remove the stepper motor without breaking the light housing (and stepper motor preferably)? Thanks!

Mark

 

Well, I figured it out myself in the end. The stepper motors are quite easy to remove - a small turn and pull. Just like the servo motors on the halogen headlights.


On testing the HIDs, I see that the lights are always adjusted to minimum height. Not sure is this is rectified by adding a height sensor. So in the end, I opted for plan B: replacing the stepper motor by the servo motor. This involves cutting away a part of the rear housing of the headlamp and mounting the servos instead of the stepper motors. The tip of the servo needed to be extended a bit (done by reusing the snap on tip of the stepper.


It is a bit tricky to get it all in but I have done it now and it seems to work!


Mark

 

Well this is all Greek or should I say Swedish to me.. But I wanted to congratulate you on getting everything sorted out and working.

 

Thanks! The nice thing about the 1997-2005 MY XKs is that you can still work on them - even the electrics!

Mark