Technical Punto mk2 strange electrical issues.

[Toomasuu]

Hi! Can somebody please give advice:
Yesterday Punto mk2 suddenly started Act strangely.
When switch ignition on, gauge needles shaking a bit, high beam light goes sometimes on, and odo display starts blinking.
Also AC and ventilaator fan are not functioning.
I cleaned battery connections and earth connetion near battery, but nothing helped....
Please share some advice.

 

[Toomasuu]

Hi! Can somebody please give advice:
Yesterday Punto mk2 suddenly started Act strangely.
When switch ignition on, gauge needles shaking a bit, high beam light goes sometimes on, and odo display starts blinking.
Also AC and ventilaator fan are not functioning.
I cleaned battery connections and earth connetion near battery, but nothing helped....
Please share some advice.

also turn signals are blinking very fast.

 

[judderbar]

have you cleaned all the earth connections near the battery or just one? Under the battery there is a small plastic box bolted to the inner wing. Thats where the instrument panel + body computer with indicator relay, and cabin fan motor earths come from

 

[Toomasuu]

also turn signals are blinking very fast.

have you cleaned all the earth connections near the battery or just one? Under the battery there is a small plastic box bolted to the inner wing. Thats where the instrument panel + body computer with indicator relay, and cabin fan motor earths come from

Thanks. I cleaned the connetion between body and box. Should I Open the box and clean inside also?

 

[AndyRKett]

Check the voltage on the battery with the engine running and not running and come back with the results, I suspect you’ve got a voltage problem causing issues with multiple systems

 

[Toomasuu]

Check the voltage on the battery with the engine running and not running and come back with the results, I suspect you’ve got a voltage problem causing issues with multiple systems

Thanks, will check tomorrow!

 

[Mike1alike]

I'd say that the battery is drained. Waiting for the mesured values...

 

[Toomasuu]

Hi, just measured the voltage: 12.8V in engine not running, 14.2V in engine running mode...
Sounds OK?

 

[Mike1alike]

Yeap! Totally ok.

 

[AndyRKett]

as the voltages look ok, it’s quite likely to be an earth problem. Start with the engine earths.

If the starter is needing a lot of extra current because of a bad earth with a high resistance that can cause the voltage to drop elsewhere in the car

 

[Toomasuu]

PROBLEM solved! I checked fuses and noticed that ventilation fan and instrument panel fuses were broke. Changed then and voila! Strangely it helped and everything is in order now.

 

[judderbar]

Thanks. I cleaned the connetion between body and box. Should I Open the box and clean inside also?

When i last looked inside my box it was not a serviceable item. The wires are bonded somehow to the connector?