Charging issue
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Charging issue
Hi guys. New to the forum.
I have a newly acquired 2nd gen. 1996. Was swapped to a 24 valve. I was told by previous owner that it needed a voltage regulator. So I’m assuming the PCM is bad? Original wiring to alternator was cut. I decided to pull the alternator to have it tested. Turns out it was bad. So Bought a new denso. I converted it to a 1 wire. I just installed it and turns out it’s only putting out 11.5v at the post on back of alternator. Same reading at both batteries. Now tach doesn’t work and wait to start light is on. My question is, what did I do wrong? Also , is there a way to test pcm? I wouldn’t be against going back to original design.
the 1 wire conversion I did was a self exciting internal regulator. It’s supposed to be set at 14.5 volts. Thanks!
I have a newly acquired 2nd gen. 1996. Was swapped to a 24 valve. I was told by previous owner that it needed a voltage regulator. So I’m assuming the PCM is bad? Original wiring to alternator was cut. I decided to pull the alternator to have it tested. Turns out it was bad. So Bought a new denso. I converted it to a 1 wire. I just installed it and turns out it’s only putting out 11.5v at the post on back of alternator. Same reading at both batteries. Now tach doesn’t work and wait to start light is on. My question is, what did I do wrong? Also , is there a way to test pcm? I wouldn’t be against going back to original design.
the 1 wire conversion I did was a self exciting internal regulator. It’s supposed to be set at 14.5 volts. Thanks!
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Joined: Sep 2010
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From: Parker, SD
Hi guys. New to the forum.
I have a newly acquired 2nd gen. 1996. Was swapped to a 24 valve. I was told by previous owner that it needed a voltage regulator. So I’m assuming the PCM is bad? Original wiring to alternator was cut. I decided to pull the alternator to have it tested. Turns out it was bad. So Bought a new denso. I converted it to a 1 wire. I just installed it and turns out it’s only putting out 11.5v at the post on back of alternator. Same reading at both batteries. Now tach doesn’t work and wait to start light is on. My question is, what did I do wrong? Also , is there a way to test pcm? I wouldn’t be against going back to original design.
the 1 wire conversion I did was a self exciting internal regulator. It’s supposed to be set at 14.5 volts. Thanks!
I have a newly acquired 2nd gen. 1996. Was swapped to a 24 valve. I was told by previous owner that it needed a voltage regulator. So I’m assuming the PCM is bad? Original wiring to alternator was cut. I decided to pull the alternator to have it tested. Turns out it was bad. So Bought a new denso. I converted it to a 1 wire. I just installed it and turns out it’s only putting out 11.5v at the post on back of alternator. Same reading at both batteries. Now tach doesn’t work and wait to start light is on. My question is, what did I do wrong? Also , is there a way to test pcm? I wouldn’t be against going back to original design.
the 1 wire conversion I did was a self exciting internal regulator. It’s supposed to be set at 14.5 volts. Thanks!
I would imagine someone could or atleast used to be able to test the pcm, and verify charging ability's. The only way I know would be to hook it back up original and see. The one wire gm conversion seems alot easier to just figure out what the issue is there.