Jump to content

"L" dash light came on today


Recommended Posts

I was driving, the '74tii, today and the "L" dash light came on and stayed on. I pulled over but everything seemed to be fine. The owners manual only indicates "battery charge". I was not far from my destination so I continued. I hope I did no damage. What are the implications of this? I can only guess that the batter is not being charged and the alternator is bad. But I'm only guessing.

What could the reasons be for the to come on and stay on?

I hope it's simple.


Link to comment
Share on other sites

In the order I'd check, from easy/cheap to more difficult/expensive:

1. Heavy brown ground wire that runs from the alternator to the engine block...it can look good and be broken right at the terminal. No ground=no charge from the alternator. Easy fix: replace wire.

2. As was pointed out--loose plug on the back of the alternator. It's supposed to be held in place with a wire bail or clip, but the clip is often among the missing.

3. Loose wires at the voltage regulator. Another plug; make sure it's tight and clean. Also check ground wire here.

4. Voltage regulator has gone south.

5. Alternator has gone south.

This all presupposes the alternator belt is nice and tight, and not slipping.

Happy troubleshooting


Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.
With your permission we and our partners may use precise geolocation data and identification through device scanning. You may click to consent to our and our partners’ processing as described above. Alternatively you may access more detailed information and change your preferences before consenting or to refuse consenting. Please note that some processing of your personal data may not require your consent, but you have a right to object to such processing. Your preferences will apply to this website only. You can change your preferences at any time by returning to this site or visit our privacy policy.