BATTERY LIGHT ON
Hotshot
Joined: Dec 2003
Posts: 15,368
Likes: 121
From: Stuttgart, Ar
What brand of alternator did you put on? Just because it's "new" doesn't mean it's good.
Check the harness plug at the back of the alternator. The wires are notorious for breaking right at the plug-in. If that's not it then have the alternator bench tested.
Check the harness plug at the back of the alternator. The wires are notorious for breaking right at the plug-in. If that's not it then have the alternator bench tested.
Cargo Master
Joined: May 2006
Posts: 2,116
Likes: 6
From: Florida
Have you checked your batteries? Also is the new alt the right one? If you put too small of alternator it will not hold the batteries at proper charge. You will need a DVOM to check the voltage while running. Most auto stores will check batteries for free
Junior User
Joined: Aug 2012
Posts: 89
Likes: 0
As mentioned, "new" alternators are often bad right out of the box. Happened to me earlier this year.
The battery light on the dash is an indicator that your batteries are not being charged, and it could be your alternator, your batteries, your grounds, or a number of other items that are much more difficult to troubleshoot. I'd start by visually inspecting all wires, including your grounds. Check for corrosion at any of the connection points (on the battery, the frame, and the engine block) as well as visible damage to the wires due to heat or chafing. If everything looks good, have the alternator bench tested and the batteries load tested. If they're all good, things get more complicated.
The battery light on the dash is an indicator that your batteries are not being charged, and it could be your alternator, your batteries, your grounds, or a number of other items that are much more difficult to troubleshoot. I'd start by visually inspecting all wires, including your grounds. Check for corrosion at any of the connection points (on the battery, the frame, and the engine block) as well as visible damage to the wires due to heat or chafing. If everything looks good, have the alternator bench tested and the batteries load tested. If they're all good, things get more complicated.
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