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Did this strip work? Usually LEDs fail individually, which would mandate an assembly replacement or a fix like the one above.
However, if the power TO the assembly is the culprit, that would have to be addressed separately.
I did use something similar to the above idea by Malawi under the mirror reflectors on my F150 to make a front turn signal there. Works good.
Did this strip work? Usually LEDs fail individually, which would mandate an assembly replacement or a fix like the one above.
However, if the power TO the assembly is the culprit, that would have to be addressed separately.
I did use something similar to the above idea by Malawi under the mirror reflectors on my F150 to make a front turn signal there. Works good.
Durrr - that will teach me not to post before reading the entire thread...
It's because they changed the design. The earlier type is the parallel unit we've been discussing. There's a later one, which I've now found in the diagram for VIN 44940 onwards:
In the above scheme, the elements indicated as 200 nF capacitors are not capacitors, but simply resistors above 1 Mega Ohm, to keep proper AC coupling between the (+) and (-) levels.
The only relevant capacitor is the big blue 220 muF 25 Volt electrolytic capacitor, to act high pass filter to pass through high frequencies and damping switch-on switch-off load on the LED brake light.
Durrr - that will teach me not to post before reading the entire thread...
It's because they changed the design. The earlier type is the parallel unit we've been discussing. There's a later one, which I've now found in the diagram for VIN 44940 onwards:
In my 2010 MY XK Portfolio:
In the above scheme, the elements indicated as 200 nF capacitors are not capacitors, but simply resistors above 1 Mega Ohm, to keep proper AC coupling between the (+) and (-) levels.
The only relevant capacitor is the big blue 220 muF 25 Volt electrolytic capacitor, to act high pass filter to pass through high frequencies and damping switch-on switch-off load on the LED brake light.
Not sure how old some of these other threads are, today's date is April 15, 2024. Anyway, 3rd light stopped working. I removed the under panels from the boot lid and traced the wires back to this little in-line circut board with the part number on it of 9W83 18K891 BA made by Laird Technologies, who are of course out of business. Nothing shows up at the dealer regarding this part number. It is not even on their wiring diagram.
I did have someone replace the diod, no luck there. For reference, the XKR-S third light is the same light as the 2014 Range Rover Sport, but they use a different isolator.
I removed the isolator, and fortunately both connectors are the same so i just bypassed it and the light and am/fm radio work find. At least for now.
06-18-2020, 01:55 PM
