Light control box modification - pic
Discussion
Hi all,
I finished the modification to my lights switching box. This mod is useful if you've fitted HID (Xenon) lamps to the dip beams on a later style Cerb, as it makes the dip beam stay on when you switch to main beam.
As the HIDs have a ballast circuit and take a few seconds to come to full brightness, its not appropriate to have the control box switching BETWEEN dip and main - you need to keep the dips on.
Modification:
1. Unplug box, remove 4 screws on connector end of box, remove PCB;
2. Solder two diodes between the main beam output connections and the dip beam connection. Diodes should be cathode (stripe) towards the dip beam connection; Scrape a little of the varnish off the PCB pad where the diodes meet to enable it to be soldered.
3. Replace PBC in box, replace cover and screws, reconnect to car.
The diodes I used are 1N5004 types, which are 10A current. Although the HIDs don't draw this all the time, there is a relatively high inrush current when they strike.
Picture of completed mod:
Of course, you undertake this modification at your own risk, I cannot be held responsible if your car explodes.
- Andy.
I finished the modification to my lights switching box. This mod is useful if you've fitted HID (Xenon) lamps to the dip beams on a later style Cerb, as it makes the dip beam stay on when you switch to main beam.
As the HIDs have a ballast circuit and take a few seconds to come to full brightness, its not appropriate to have the control box switching BETWEEN dip and main - you need to keep the dips on.
Modification:
1. Unplug box, remove 4 screws on connector end of box, remove PCB;
2. Solder two diodes between the main beam output connections and the dip beam connection. Diodes should be cathode (stripe) towards the dip beam connection; Scrape a little of the varnish off the PCB pad where the diodes meet to enable it to be soldered.
3. Replace PBC in box, replace cover and screws, reconnect to car.
The diodes I used are 1N5004 types, which are 10A current. Although the HIDs don't draw this all the time, there is a relatively high inrush current when they strike.
Picture of completed mod:
Of course, you undertake this modification at your own risk, I cannot be held responsible if your car explodes.
- Andy.
Edited by alinton on Monday 1st January 18:44
Edited by alinton on Monday 1st January 18:46
It is necessary to disable this when using HIDs; You need to cut and insulate a wire coming from the dim/dip box - the small box on the right in the boot.
I _think_ its the black/red wire but can't be sure and I'm not home to check. If you've a voltmeter then its the one with about 7 volts on it when sidelights are on.
Perhaps someone else can confirm the wire colour.
Andy.
I _think_ its the black/red wire but can't be sure and I'm not home to check. If you've a voltmeter then its the one with about 7 volts on it when sidelights are on.
Perhaps someone else can confirm the wire colour.
Andy.
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