What shoould the voltage be?, Regulator issues |
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What shoould the voltage be?, Regulator issues |
worn |
Oct 1 2014, 08:30 PM
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#1
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can't remember Group: Members Posts: 3,164 Joined: 3-June 11 From: Madison, WI Member No.: 13,152 Region Association: Upper MidWest |
After returning from the ockteenerfest we were able to regroup. I ran a potted voltage regulator for much of the trip,but it charged low. I substituted a more old school metal box vr only to find that the power transistor appears to have shorted running full current to field windings al the the time and cooking the battery. Tired of that.
So I took a collection of 5 VRs to test with variable voltage and found that they all stopped sending current to the field windings at approximately 14 volts. Great! The solid state units did so in silence, the oem stuff emits a buzzing sound. So they work. However when installed on a new alternator and new battery I tend to see charginging at only around 12 volts. I am puzzled and wonder how normal this is. Any thoughts? |
Spoke |
Oct 2 2014, 08:31 AM
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#2
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Jerry Group: Members Posts: 6,991 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
Why the new alternator? Seems like your VR testing showed the alternator was working.
Is the GEN light coming on with the 12V output? Where are you measuring the 12V? If with the new alternator you are seeing low voltage, then time to start over again with testing. Check the alternator for output. With the VR removed, short the D+ and DF spades on the relay board. You should have 16V or so. |
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