Service lights

[flatfourfun]

I have just reset my service lamps (Short the two pins). I had to do it twice, once for the lights and the second time for the clock symbol / inspection. The problem is that now only 4 greens illuminated. Also, I bought the car with 2 greens, but was on yellow within 1000 miles. Are these all symptoms of si failure or just needing new batteries?

[Templ8e30]

Sounds suspiciously like a dying SI board

I'm changing mine today for a known good spare, the inspection clock comes back on every few weeks even though the green countdown lights are ok. This board had new batteries a year ago.

The new boards have small lithium batteries instead of AA Nicd's and seem to be more reliable.

Cheers,

Iain T

[chief]

sorry to but in on this one guys , i think i may have the start of a similar problem.
but i don't know what a si board is
sorry i'm just a basic diy mechanic
thanks

[Steviec]

sorry to but in on this one guys , i think i may have the start of a similar problem.
but i don't know what a si board is
sorry i'm just a basic diy mechanic
thanks

Same here, but I just put up with the lights. Think of them as early xmas decorations. lol

[Templ8e30]

The SI board sits inside the instrument cluster, It connects to the instruments and uses algoritms to work out when your engine needs a service.

It uses Rpm/engine temperature/Mpg etc to work this out.

The board has 2 batteries soldered to it, older boards have 2x AA batteries and newer boards have 2 Lithium 3 volt batteries and are more reliable.

The batteries die over a period of about 10 years and start giving problems with the lights and certain instruments.

The older AA batteries can be replaced by unsoldering them and fitting new ones from Maplin or RS (they have a little tag on each end) but it's probably easier to get a replacement board.

To change it you need to remove the instrument cluster from the car then undo the 10 or 12 screws from the back. Split the cluster, the back half has the instruments and the front half has the SI board and the instrument surround. Undo 1 screw and remove the board.

Once refitted the SI will need the lights resetting.

Hope this helps.

Iain T

[chief]

now i know

thanks