Hi guys,

I took car out earlier and this light came on. Volt gauge read 13 and increased a little with revs. I checked battery and it's ok. I checked alternator and it read 13.3 volts so it's ok. I'm thinking my belt was slipping dropping the alternator output thus tripping the light. I am gonna check drive belt tensioner and maybe replace. The light has not come back on since I took the battery out and tested it. Connections were all secure. I have 52k miles. Any thoughts? Thanks!

 

Keep watching it. Doesn't sound like trouble yet...

 

How old is that battery???

 

Mine came on once about 4 months ago. Never came back on.

 

Replaced drive belt and ordered tensioner just in case. Started and light on again with 12 volts on gauge and no accessories on. Alternator I'm thinking.....

 

Sounds like the alternator is dying a slow death. This is what happened to me. At one point when I first started the engine, the gauge read close to 13 and then started to go down as I drove more until it was below 12 Volts.

R&R and the voltage gauge reads just under 14 Volts with all accessories on.