Thread: SRS dashboard light ...

Didn't touch enough wood apparently!
Srs light has gone back to being intermittent, where to now guys & gals?
Cheers
Mat

I had intermittent srs light some time ago, eventually tracked it to voltage spikes caused by hidden corrosion on battery terminals - cleaned, hasn't come back

Will give it a go, thanks Andrew

Originally Posted by D2Andrew

I had intermittent srs light some time ago, eventually tracked it to voltage spikes caused by hidden corrosion on battery terminals - cleaned, hasn't come back

Andrew,

How did you diagnose a voltage spike at the battery terminal?

Cheers,

Franz

took me a while, noticed interior light was changing brightness
weird thing was the corrosion was only affecting current into the battery, cranking was ok
also probably explains why I cooked 2 coil packs
I'm still annoyed I missed such a basic bit of maintenance

Cheers
Andrew

After giving your Batt terminals a good clean and refitting everything, give the terminals a light spray over with one of those lanolin derivate protective sprays (lanogaurd is aussie).

seals the terminal and stops corrosion dead in its tracks and is effective till next time you remove a terminal connector and cleans off easily if required.

way better than WD40 and the like.

cheers

Originally Posted by Tombie

In AUS LR officially extended it to 15 years....

Same with our Toyota Camry. Any chance it was a legislative change, rather than one by the manufactures?

Originally Posted by D2Andrew

took me a while, noticed interior light was changing brightness
weird thing was the corrosion was only affecting current into the battery, cranking was ok
also probably explains why I cooked 2 coil packs
I'm still annoyed I missed such a basic bit of maintenance

Cheers
Andrew

So not a spike, but a loss in volts.

Found this in Wikipedia
"Metal rectifiers consist of washer-like discs of different metals, either Copper (with an oxide layer to provide the rectification) or Steel plating (plated?) with Selenium , interspersed with aluminium discs (which were often of a larger size, to provide cooling)."

so, if your cable and clamp were different metals, one of which had oxidised, then perhaps you had created a fairly primitive diode/rectifier at the battery terminal, which would explain the voltage drop in one direction only. (In real terms, you would have a voltage drop in both directions, but fairly small in one direction).