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Discussion Starter · #1 ·
i have a suspicion that my alternator is failing ie. i have a permanent battery and brake light on my dash

so i want to check it with a multi-meter, do i check the voltage on the battery terminals when running to see if it is near 13.8-14v or to i check this on the alternators itself?

thanks in advance
 

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Premium Member
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i have a suspicion that my alternator is failing ie. i have a permanent battery and brake light on my dash

so i want to check it with a multi-meter, do i check the voltage on the battery terminals when running to see if it is near 13.8-14v or to i check this on the alternators itself?

thanks in advance
across the battery is fine

check with engine / ignition off, again on tick over, and again while holding some revs

Stu
 

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Discussion Starter · #5 ·
Alternator it is.... 10.5v with the engine on 9.1-9.6 with engine off
 

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Alternator it is.... 10.5v with the engine on 9.1-9.6 with engine off
that battery looks to be flat to the point of knackered. Agree it does sound like alternator, but I'd be tempted to try a known good battery first or charge and test that 1

Stu
 
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