In the interest of having less heat from bulbs, and a little quicker on-time on the brake lights, I got a pair of the kind needed for the brake/tail light lamp.

Got the amber bulb-out warning every time I hit the brakes or had the parks/head lights on. Matched pair, why the waring?

That experience set me off from getting any more LED's.

Any ideas? Add a resistor to make the current load equal that of incand., bulbs?

Thanks in advance,

Bob

:>)

Hi Bob,

The warning sensor is finely tuned (number of turns/wire gauge) to the bulb currents it expects. Three different coil arrangements around the reed switches for three different sets of lights. If all three (there are three in a S90 right?) brake lights are replaced I wouldn't expect the warning either, but I'd realize I was in uncharted territory and might have to take some measurements to explain things.

If you have LEDs and reliable sockets, you won't need the warning light anymore. It was developed to tell you about broken filaments. Resistors to soak up the energy you saved defeat half the purpose.
--
Art Benstein near Baltimore

When everything's coming your way, you're in the wrong lane.

Hi Art -

Yeah, I forgot about that exotic coil layout for the 3rd light. Ratz.

Hmmm. Maybe make the fog lights into additional brake lights using LED's ?
Make the right light workable and power the lights ahead of the rear BFWS relay? That relay is is mounted in the LR storage compartment, so it's handy.

Maybe put LED's into all three brake lights?

Maybe I'll just try using yellow LED's for the trun signals. Might look cool behind the clear lens. But - would the flasher work? I understand that the "old" kind that use a heating strip would not, but there are some that are electronic.

Wonder if the "modern" 960 has the "modern" relay?

Thanks,

Bob

:>)

Wonder if the "modern" 960 has the "modern" relay?

I think it is, based on the fact my '79's flasher is electronic. But that doesn't mean it isn't purposely bulb current sensitive, to provide the same old rapid flashing indication of bulb out.

Someone I know recommends getting the Volvo WDM literature at a minimum, for factory-correct electrical info. Does that still work for 1997?
--
Art Benstein near Baltimore

Every calendar's days are numbered.

Art -

Shortly after we got the 965 I got a number of Volvo Manuals, includig the WDM. It a far cry from the 240-style WDM books.

In fact, it is a well made photo-copy of the Greeen book. No color at all. 200+ pages, no whole-car schematic as that would maybe cover a wall. I have used it a bit, like when the headlight switch went kaput. There is so much more to cover than a 240, anyway. Dimming interior lights, lights in the power window switches, the power seats, front and rear BFWS relays, reading lights for the rear seat passengers, etc. Well, maybe the 740/760/780/940 cars had that stuff, I don't know.

It covers a lot, but not the little symbols I found on the tail light housing. Little triangles in a square, look like the old signal flags. Any ideas on them?


Thanks for the ideas,

Bob

:>)