2001 Sonata Warning Lights
 

Without any apparent mechanical changes, after a warmup period of maybe
five minutes,the battery and brake warning lights come on and usually stay
on. Also at times, the speedometer and tachometer needles drop to Zero
while the car is still operating normally, then the speedometer needle
starts working again, alone, while the Tach is still at Zero. At times,
the 'air-bag' warning light also comes on and stays on. A/C still pumps out
cool air, but not at full volume for any selected speed. I suspect a loose
connection, but would like to know where to start looking. Any help is
appreciated.

Re: 2001 Sonata Warning Lights
 

Start looking at the alternator. Low voltage can cause any number of odd
occurrences.

Re: 2001 Sonata Warning Lights
 

Start looking at the alternator. Low voltage can cause any number of odd
occurrences.

Re: 2001 Sonata Warning Lights
 

Start looking at the alternator. Low voltage can cause any number of odd
occurrences.

Re: 2001 Sonata Warning Lights
 

Klaus Macon wrote:
> Without any apparent mechanical changes, after a warmup period of maybe
> five minutes,the battery and brake warning lights come on and usually stay
> on. Also at times, the speedometer and tachometer needles drop to Zero
> while the car is still operating normally, then the speedometer needle
> starts working again, alone, while the Tach is still at Zero. At times,
> the 'air-bag' warning light also comes on and stays on. A/C still pumps out
> cool air, but not at full volume for any selected speed. I suspect a loose
> connection, but would like to know where to start looking. Any help is
> appreciated.

I had an Excel with and instrument panel that did very strange things.
The turn signals would cause the tachometer to go up and down
and stuff like that. I was all because of a broken ground connection.

- Mooron

Re: 2001 Sonata Warning Lights
 

Klaus Macon wrote:
> Without any apparent mechanical changes, after a warmup period of maybe
> five minutes,the battery and brake warning lights come on and usually stay
> on. Also at times, the speedometer and tachometer needles drop to Zero
> while the car is still operating normally, then the speedometer needle
> starts working again, alone, while the Tach is still at Zero. At times,
> the 'air-bag' warning light also comes on and stays on. A/C still pumps out
> cool air, but not at full volume for any selected speed. I suspect a loose
> connection, but would like to know where to start looking. Any help is
> appreciated.

I had an Excel with and instrument panel that did very strange things.
The turn signals would cause the tachometer to go up and down
and stuff like that. I was all because of a broken ground connection.

- Mooron

Re: 2001 Sonata Warning Lights
 

Klaus Macon wrote:
> Without any apparent mechanical changes, after a warmup period of maybe
> five minutes,the battery and brake warning lights come on and usually stay
> on. Also at times, the speedometer and tachometer needles drop to Zero
> while the car is still operating normally, then the speedometer needle
> starts working again, alone, while the Tach is still at Zero. At times,
> the 'air-bag' warning light also comes on and stays on. A/C still pumps out
> cool air, but not at full volume for any selected speed. I suspect a loose
> connection, but would like to know where to start looking. Any help is
> appreciated.

I had an Excel with and instrument panel that did very strange things.
The turn signals would cause the tachometer to go up and down
and stuff like that. I was all because of a broken ground connection.

- Mooron