If Someone used a small 4amp batterey charger on a scout, and connected it the wrong way round with the battery still in the vehicle ?

I don't know. What did happen when a small 4 amp battery charger was connected the wrong way round. 

 

Thanks AG Falco

Well, its not my car, and I don't know if thats what has happened, it's just something I suspect might have happened. was just putting it out there as an hypothetical question to see if someone could throw some light on the consequences of doing such a thing.

The car is in a mess so don't try this at home.

Edited 21 February, 20197 yr by Straydragon

I would be very surprised if it were to have any effect on the vehicle battery or electrical system, at most it might create the same volt drop as turning on the sidelights.

 

The battery charger might be toast though.

The Battrey charger is alive and well the battrey not so good won't hold any charge and is showing 7 volts, the abs light as come on also the brake light is flashing and beeping, the engine managment light and the steering wheel icon is also lit, the speedo as stoped working and the fuel gauge drops from full to 1/2 when the footbrake is applied, the local vw audi specialists are stumped, vag com as flaged 19 faults, the abs is not comunicating with the cpu, and they think its maybe a wiring fault, but not sure.

 

 

 

 

Sounds like the battery is dead. Have they tried putting a healthy battery in and clearing the codes?

 

These cars don't appreciate low battery voltage, it's still possible something else has been damaged. Without the scan from VCDS it's hard to guess

I think the battery had become discharged from the car not been used very much, and when it was used it was very short journeys in the dark, thats why the charger was used.

I've just got back from the garage, and I ran the the scenario of the charger been wrongly connected, and his reply was, " that would fry the cpu" He then rang vw?audi specialists to let them know what might have happened, I'll let you know how this develops.

It's really going to depend on what state the car battery was in when the charger  was connected.

 

If the battery had any sort of charge, it would have blown the fuse in the battery charger, asuming it had one, & not a bent nail that someone replaced the last blown fuse with.

If the battery was totally flat, the charger may have had enough power to reverse the voltage accross the battery & that may then have caused expensive problems to various electronic circuits including the ECU.

 

You need a good battery connected, then see what's wrong from there.

Protecting an electronic circuit against reverse polarity is the most basic and first principle, there will be no damage sustained by the ECU or any of the canbus micro-controllers although I dont doubt that the garages will tell you that there has been.