Need Help - BMW E30 M20B20 alternator is not charging battery
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- Опубліковано 30 вер 2024
- Need Help - BMW E30 M20B20 alternator is not charging battery
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A few simple steps
Is the charge light operating as it should , ie coming on with ign only then going off when you start the engine ? It energizes the charging circuit .
If it is check if the alternator is rubber mounted , if it is check the earth lead between the alternator body & the engine bracket or block .
Then check the voltage at the main battery lead at the back of the alternator, could be a high resistance there .
If the car has a harmonic balancer check the rubber bonding on the crank pulley.
Cheers Simon
you need to earth the alternator to the engine and engine to the body
Once it is running, if you disconnect the battery and the car dies, your alternator is bad.
Hi there have you find the solution ??, I’m suspecting the cluster wires .. or the exciters wires .. ?? Kindly I would like to know .
Did you figure it out?
Check the cable from alternator to cluster! Yes cluster , in the back of cluster there is c1 c2 c3 color white yellow and blue . The blue one check the connectors . Check also the cables on the alternator there are 2 wires the small one follow it if there is any cut there one of it goes to cluster . Good luck
Bad battery? What's the voltage across the battery with the car running?