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> Battery Charging System, Battery not charging
Schmaz356
post Apr 20 2023, 10:46 AM
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I am building a 914-6 and I have an issue where the battery does not charge. Basically everything is new on the car (alternator, voltage regulator, battery & cables). The car runs fine but just will not charge the battery. I have checked the grounds on the body and at the transmission. The belt seems fine and is new. I pulled the battery and the regulator and brought it to a shop where they said it was putting out 14.2V using my regulator.
My Alternator wires are as follows;
Red from B+ to Starter
Black from DF to DF on the Regulator
Brown from D- to D- on Regulator
Blue from D+ to D+ on Regulator and then to the Dash Battery Light. (which is on all of the time)
Ground from D- to engine case.
When I put the system back together, I checked the continuity of each cable to assure myself it wasn't just a pulled connector or broken wire. When the car is running and reved to 2,000 RPM I still only get battery voltage.

Please help with any thoughts on what I should check next. Thanks.
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brant
post Apr 22 2023, 09:41 AM
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You have to put a one way resistor into circuit
We did also in our conversion

I’ll try to pull my diagram today for the info
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Superhawk996
post Apr 22 2023, 10:40 AM
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QUOTE(brant @ Apr 22 2023, 10:41 AM) *

You have to put a one way resistor into circuit
We did also in our conversion

I’ll try to pull my diagram today for the info

Not pointing this out to shame you, just the facts.

There is no such thing as a one way resistor. All resistors are are bi-directional.

Are you referring to a diode? Small black, round cylindrical package with a band on one end. Diodes only flow current in one direction. Could easily be mistaken for a resistor to anyone not intimately familiar with electronics.

I don’t have schematic in front of me but i do know there is a diode used in my 73’ behind the instrumentation.
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Posts in this topic
Schmaz356   Battery Charging System   Apr 20 2023, 10:46 AM
windforfun   Try a different voltage regulator. It should be p...   Apr 20 2023, 11:09 AM
porschetub   Try a different voltage regulator. It should be ...   Apr 20 2023, 07:56 PM
Schmaz356   Thanks for the input. One other thought. I read on...   Apr 21 2023, 06:17 AM
davep   The alternator light in the instrument CANNOT be a...   Apr 21 2023, 08:38 AM
StarBear   The alternator light in the instrument CANNOT be ...   Apr 21 2023, 08:45 AM
ClayPerrine   [quote name='davep' post='3072804' date='Apr 21 2...   Apr 21 2023, 10:46 AM
Spoke   On a 914, the bulb must be an original 12 volt, ...   Apr 21 2023, 11:34 AM
ClayPerrine   [quote name='ClayPerrine' post='3072832' date='Ap...   Apr 21 2023, 11:48 AM
Spoke   I am building a 914-6 and I have an issue where t...   Apr 21 2023, 10:25 AM
dr914@autoatlanta.com   do you have a replacement alternator with a built ...   Apr 21 2023, 11:04 AM
Schmaz356   Thanks to everyone. The issue was the fact I used ...   Apr 22 2023, 09:14 AM
brant   You have to put a one way resistor into circuit W...   Apr 22 2023, 09:41 AM
Superhawk996   You have to put a one way resistor into circuit ...   Apr 22 2023, 10:40 AM
brant   Here is our racecar wiring   Apr 22 2023, 10:38 AM
brant   Correct. Diode Old man’s disease Plus I really ...   Apr 22 2023, 10:43 AM
Schmaz356   When I saw the symbol I knew it was a diode. Thank...   Apr 23 2023, 06:49 AM
Schmaz356   Brant; One more question. I installed the diode li...   Apr 24 2023, 09:17 AM
brant   I don't know... thought that the light would ...   Apr 24 2023, 09:23 AM
Schmaz356   Brant; One more question. I installed the diode li...   Apr 24 2023, 09:57 AM
Schmaz356   Okay, Thanks.   Apr 24 2023, 09:58 AM


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