Gen Light

[Jeff Burke]

Driving into work today, the GEN light came on and stayed on. Any hints as to what that's all about?

 

[illflem]

What's your in-dash voltmeter reading?

 

[Jeff Burke]

Voltmeter was reading low, but is back to normal. I have driven it once since this morning and no Gen light. I get concerned when things like this happen, trying to correct it before I get stuck.

 

[illflem]

More than likely you have a bad ground somewhere, going to be hard to find until it becomes an all the time problem instead of a intermittent one.

 

[Missouri Mule]

Jeff,

Check connetions at your battery temp sensor and the engine speed sensor. Of course any wiring coresponding to these sensors.

Engine speed sensor relay turns on the ASD relay which sends line voltage to the computer.

Battery temp sensor sends temp reading of battery to computer.

From this data the computer regulates the alternator/generator voltage out put.

From what you have stated that it is working again I would say it is dirty/bent pin in connectror or loose/broken wire.

Bad ground wire sounds good too.



good luck!

 

[Extreme1]

What year truck and how many miles? I had to replace my alternator brushes a couple years ago. They were worn out and the voltmeter was low.