Jump to content
CaddyInfo Cadillac Forum

Flashing battery lamp on dashboard STS 1998

Recommended Posts

After a "check charging system" error my shop repaired my Cadillac STS 1998 generator (one diode and regulator was broken). Reinstalled the generator and everything. Started and the "check charging system" error was gone. But the dash boards says the battery load is only 11.8 V and the warning battery lamp on dashboard is flashing fast! No error codes to pull out. A mechanic said it probably is wrong regulator installed. The electronic shop checked but says it's correct regulator due to their manuals and connections to generator are correct. Does anyone have a clue what to check for?

Link to comment
Share on other sites


My two cents...Check the plastic piece clipped on the battery cable(s) at the battery. I chased down a similar situation and that voltage sensor had barely a hair of the stranded wire attached to the sensor. I ended up cutting, stripping, soldering and re-connecting the wire. How about a little detective work. Place a volt meter on the battery terminals to verify the voltage. Does the voltage vary with load? Turn on high load accessories and see if the voltage is affected. Your shop should be responsible for verifying the alternator is putting out enough voltage and amperage to keep the battery charged. As you are probably aware, 11.8 volts will not do it!

Best of luck... don't give up!

Ohio Jim

Link to comment
Share on other sites

Thanks for answers. Hm, the flashing battery lamp wasn't on before just after the alternator repair was done so it seems unlikely the battery wirings will mess. Seems more likely it's a regulator problem. The generator doesn't load at all on any rpm. However I will check the battery wiring just to be sure.

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.

  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Create New...