Suzuki Swift Charging Issues

Lynnie789

Be really grateful of any help.
     I have 07 Suzuki swift. The battery went flat, tested the voltage & it was not charging.
                We change the alternator and fit new battery, check the voltage charging at 14v, switch on anything in the car Alternator stops charging & battery drains.
After this the alternator stops working altogether, so we assume faulty Alternator... but this happened again on the second and third alternator, purchased from different stores. We have checked all the earth straps & all seem fine & checked all terminals. The one strange thing that is happening is, the battery light comes on when you turn the ignition on & goes out as it should, even though the battery isn`t charging. Husband is good with cars, but this has him beat.

Ectophile

My suspicion would be a poor connection somewhere, maybe a broken wire.  So the alternator spins fine, but the power never makes it back to the battery.  But it's the sort of thing that would be difficult to diagnose without the right equipment, and knowledge of what to check.

AdrianC

Sounds like a job for an auto-electrician.

Car electrics these days aren't as simple as they used to be - most electrics are canbus multiplexed, basically a computer network between the body control ECU and the various things around the car. I suspect it ultimately comes down to poor, corroded connections somewhere, but tracking them down...

Lynnie789

Just to bring a close to this. Someone suggested buying a genuine used Alternator from a scrapyard. It`s now fitted & works fine.