Re: [Quantum Owners] Abridged summary of - 4 updates in 1 topic

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Nigel Plant

Jul 9, 2021, 3:34:32 AM7/9/21
Very interesting Jim. Thanks for sharing.

On Thu, 8 Jul 2021, 22:09 , <> wrote:
"Jim Hearne" <>: Jul 08 10:30AM +0100

Has anybody seen any articles on why you shouldn’t use “CANBUS” compatible LED bulbs in older cars.
Or, at least not without modifying them first.
If not i may write one.
Ian Harrison <>: Jul 08 10:58AM +0100

From what I’ve seen, the only thing that makes them CANBUS compatible is a
built in resistor fooling the computer into thinking it has a working
filament bulb.
Ian Harrison <>: Jul 08 11:00AM +0100

aaaand I missed the point of your post completely.
No I’ve not seen an article about this either way.
"Jim Hearne" <>: Jul 08 11:31AM +0100

Indeed, the problem is that that resistor is dissipating a lot of heat.
In a real bulb that heat is mostly dissipated though the glass and into the air around the bulb with very little conducted ...more
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