this started as an intermittent problem. since i can't get my mechanic/nephew to even look at this car i'm trying to figure it out on my own. i've checked the battery, fuses, relays and grounds. i took the power probe to the ignition switch. in the run position i'm getting 5v on the white/black wire. with the switch in the on position i get nothing on the white wire, but if i unplug it i'm getting .3v as a static reading. i'm inclined to think it is the switch but i hate to spend the money and that not be it.


any advice?

 

The ignition switch does not work the way you think it does. Your readings may be just fine.

What year/model
Recalls done?
What exactly is the problem?

The usual problem is the connections between the top and bottom of the under hood fuse box.

 

09 hhr panel 2.2l

if it's in the fuse box this old lady is up a creek.

 

You did not actually state the problem.

 

This guy at least shows how to get to the problem area. Don't listen to his diagnostics.

 

it's an intermittent no crank problem. right now it's dead in the water at work

 

pbbbbbt! i can do that! but it is a job for tomorrow morning

thx!

 

The ignition switch only has one wire, a resistor in the switch controls which signal is sent, run or crank. The BCM then send signals to the various relays and systems.

The choices are relays, fuses, wires or connectors. Intermittent makes it really difficult. If many systems are involved I.E.: you have several engine codes it is usually the fuse box is misbehaving.

If there are no codes you should look at the battery the starter and the alternator.

 

You know that the hhr was part of the recall for the ignition switch. That's why donbrew asked about recall status.

 

no open recalls, battery is hot, even tried a new one. i'll have to get someone under it to check the starter and the alternator wasn't acting wonky.