Lots of lights on dashboard, high voltage on gauge, a/c won't turn on

My 2007 has the traction light on, the vsc flashes, abs light on, rsca off light on, brake light on but brake not applied, voltage gauge reads at 19 volts with truck running. A/C fan won't turn on. I have driven this truck for 2 weeks since I replace all 8 ignition coils and all 8 fuel injectors. I have never had this happen before.

 

Have you verified voltage at the battery? Has the alternator ever been changed?

 

I'm not home at the moment. The truck did sit awhile before I was able to get the I jectors put in, one of the old ones had pieces of wire in the top of the injector. This issue just appeared today. Truck started up fine, the smog pumps didn't come on, the a/c wouldn't bow at all or turn on. All of those lights came on, no CEL and not one code. While the truck was down, it was on a trickle charger. But yes when I get home I'm going to check the voltage, at this moment I'm think bad cell in the interstate battery which I did have happen the last time the truck sat for awhile when I had to replace the water pump and radiator. The voltage gauge reads at 19 volts while running. Now the last couple of days the reading on voltage was less than normal per the gauge, but never high. It has been fluctuating before, but not to the high side. I did get the battery at costco and it's still under warranty.

 

I think you’re on the right track. A bad battery can throw the onboard computers into malfunction. I’d take a DMM to confirm you aren’t really getting too much voltage from the alternator.

 

The alternator was changed some years ago, but then the truck was just dead, wouldn't start. I will check the voltage and just for laughs take it back for a warranty exchange.

 

I think I'm going to upgrade the battery to the AGM also.