Electrical concerns

[Ihatehornets]

Good Evening,

 

To start I have a 2004 GMC Sierra 2500HD, 6.0 Gas that I've had for a little over four years.  I've noticed that the clock display on the radio and the lights are warm to the touch. Additionally, the blower motor resistor has gone out along with one or both of the blend door actuators.  Perhaps these are just signs of an aging vehicle but I'd rather ask the question than wait till it becomes a larger problem.  I starting to think that these are getting too much power and that something needs fixing.  I should also say that this truck occasionally loses all power then almost immediately comes back on.  This was a real problem up North in Cheyenne when it was really cold but since moving back to Florida it doesn't happen nearly as much.  This isn't my daily driver and I've been slowly replacing parts as needed (plugs, wires, pulley tensioner, water pump, thermostat).  Any advice in the right direction would be appreciated, thank you and have a great day.

[davester]

maybe test the voltage the alternator is making when the engine is at idle as well as at speed (say, 3k rpm).  voltage shouldn't go over about 14.5V or so, if it does, then something is going wrong.

 

blower resistors commonly fail, not a sign of electrical problems.