mazda 626

[christophe]

can anyone help . i have a problem with mazda 626 1993 model. It loses elctrical power spedo and tacho bounces . radio stops working windows go up realy slow. put a new battery . Its like the altanator isent chargeing the battery. but when i disconet the battery engine keeps running with everything running fine. could the alltenator be playing up . or could it be the fuseable link ?
Thanx anyone

[Godzilla]

Lets clarify your problem.

When the battery is disconnected the car runs without a problem, no gauges jumping or warning lights showing.

Connect the battery and all hell breaks loose?

When the engine is off and the ignition switch is on what happens, does your radio and electric windows work ok? Any other changes?

When you start it, any difference?

To check your fuseable link just test with a multimeter.

It could also be your alternator, try starting and running it with the battery and alternator connected and then only undo and disconnect the alternator from the battery terminal to see if all runs well off just the battery.

If so its probably just the alternator.

Also check your earth leads where the meet the engine block and body, take them off and sand the body and lead a little.

Faulty earth connections can cause some very strange problems.

[rob916]

Had a friends VT do stuff like this. Loss of speedo, guages, car cutting out and other strange things.
It was the active cable from the battery to the alternator, came loose at the alternator end and proceeded to short out and blow chunks out of things, melted the whole brass stud off that it used to connect to.