Thread: Help - Electrical Ac/ Heat issues 2002 Grand Prix GT

Hello all,

I am new to this forum and would really appreciate your help before I pay someone a ton of money to fix a potentially easy problem.

The issues:

Ac/ Heat do not work unless the switch is on the highest setting. My digital diagnostic display is out (the diagram of the car which shows a door open and also gives you your mpg, distance to empty etc.) and my day time running lights are out.

I saw online the ac and heat issue could be the blower resister but would this also be affecting the lights and electrical? It all happened at once.

If you know what may be wrong, is this something I could fix myself? I am not a mechanic and the extent of my experience is switching out an alternator and basic maintenance.

Thank you so much in advance

Sincerely,
Brian

Check fuse 29 in the underhood fuse panel.

Originally Posted by hitman92499

Check fuse 29 in the underhood fuse panel.

Thanks for the suggestion, Fuse 29 looks good

Well, in that case, check all the fuses first. Chance that it's a coincidence seems unlikely, but it IS a Grand Prix so these things could happen. Don't forget about the fuses in the glove box area.

Thanks, I will look into this.

Originally Posted by Swiggles

If its not the fuse then it just be a coincidence that it happened at the same time. The bulbs in the back of the dic (mpg stuff is called the drivers info center of dic) are these I'm pretty sure, there's 3 for the screen http://www.amazon.com/ACDelco-PC168-...lco+light+bulb

If those aren't the right size then I think these are Amazon.com: ACDelco PC74 Bulb: Automotive

Thanks, I appreciate it

Originally Posted by dsmuts

If the blower only works on high then your resistor is probably bad. Where are you from in oh?

I am in the Warren area.

I have been sinking a ton of money into this thing lately, only has about 60K on it and very clean so I don't want to get rid of it but its like one thing after another.

Hello All,

I discovered something additional about this issue. When the car starts up the drivers information center works just fine, I do notice that when the fan speed is at zero the headlights work, then the intervals until high phase out the headlights and then they come back on again on high fan speed.

Any clues?