Charging System not charging

[MercedesTech]

Hey,

I got my car running but the charging system is not charging and battery light is not coming on even though it is not charging. I have battery voltage 12.045 volts at alternator stud and at the exciter wire. I replaced the alternator today but starting to think I got a bad alternator cause i checked the cluster battery light bulb which is working fine and I ohm tested the cluster and got 5.54 ohms which is what the bulb tested at. So if anyone can help ill listen and answer any questions to the best I can.

Thanks

[AWDBOB]

Is the alternator grounded? Early alternators have rubber grommets and thus require a separate ground wire. If left ungrounded, it'll leave similar symptoms to what you're facing.

[MercedesTech]

Is the alternator grounded? Early alternators have rubber grommets and thus require a separate ground wire. If left ungrounded, it'll leave similar symptoms to what you're facing.

Thanks AWDBOB that fixed my problem, I just used sum wire that was laying around so I'm going to go to the part store and make a better ground out and thicker gauge then 20 gauge wire.