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How do you know if a regulator is bad on a 1989 harley Davidson?
Wiki User
∙ 12y ago
Check your stator first. That is the two wires coming out of the front of the case on the left side. With the bike running it should read about 18VAC. The two wires go directly to your regulator. Check the output of the regulator. You can do this at the battery. A charged battery should read between 12-13VDC (bike not running). Start the bike. Check for DC voltage at the battery again. It should read 14-14.5VDC. If you are only getting battery voltage with the bike running (1500-2000RPM) and the stator (rotating assembly) is putting out 18VAC +or- 1VAC your regulator is bad.
Wiki User
∙ 12y ago
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How do you know if a stator is bad on a 1989 harley Davidson?
Unplug your voltage regulator at the front of the crankcase on the primary side. Use a multimeter set to "AC", by inserting the probes into the two holes and rev your bike to about 2500rpm or so. You should get about a 40-60 volt reading. You should also check for a ground, by doing a continuity test, or use the OHM setting on your multimeter to make sure the stator is not grounding out. If everything is good there, and your not charging up, your regulator is bad.
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