MONTE CARLO battery drain issue

[BlueJay84]

Hello, I recently purchased a 1984 Monte Carlo SS and I'm having a battery drain issue. The original 305 was replaced with a 350. I've narrowed the issue down to the 2 wires connected to the alternator. One wire is a heavy gauge that goes to the battery, the other is a small gauge that goes into a wire harness but I'm not sure where it goes. When I disconnected them my test light went on then dimmed out within a few seconds. If I connect one wire at a time the test light won't come on. The test light only comes on when both wires are connected at the same time. Any help would be much appreciated

 

[BlueJay84]

That's how I fix stuff- just unhook things until it works right without any troubleshooting. Get the 2 pin plug for the side and wire it correctly, chowderhead.

Do you know the part number for the correct plug? Also, do you have the correct wiring diagram?

 

[fleming442]

https://www.napaonline.com/en/p/ECHVRC148?cid=paidsearch_shopping_dcoe_google&campaign=GSC-Alternators-Starters&campaign_id=6503920054&adgroup_id=73349362010&adtype=pla&gclid=EAIaIQobChMIyI-1zLSh7wIVYeyGCh3-fwcbEAQYBSABEgLpQfD_BwE&

 

[BlueJay84]

https://www.napaonline.com/en/p/ECHVRC148?cid=paidsearch_shopping_dcoe_google&campaign=GSC-Alternators-Starters&campaign_id=6503920054&adgroup_id=73349362010&adtype=pla&gclid=EAIaIQobChMIyI-1zLSh7wIVYeyGCh3-fwcbEAQYBSABEgLpQfD_BwE&

View attachment 170053

Thanks for the help chowdah head lol

 

[565bbchevy]

Do you know the part number for the correct plug? Also, do you have the correct wiring diagram?

The 1 wire alternator is self exciting so the added plug and wiring is not necessary to kick it on, that is why there is a plug there.

 

[BlueJay84]

The 1 wire alternator is self exciting so the added plug and wiring is not necessary to kick it on, that is why there is a plug there.

What happens if you install a plug anyway?

 

[565bbchevy]

What happens if you install a plug anyway?

Most 1 wire alternators can be wired to use the plug if wired correctly, the main purpose of the 1 wire is ease of installation and to give it a clean look without the extra wires.