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Re: 09' hhr fog light wiring
You will need to completely wire your own setup. The "stock" fog lights on the HHRs are wired through the Body Control Module computer which can not be reprogrammed without being replaced. Cost of the computer is over $300 and certainly NOT worth it for a set of fog lights. Put in your own switch, wiring, etc. I would highly recommend that you use a relay to power them since the electrical system for the HHR is very sensitive to external additions.
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If you bought the fog lights from Ford and they plugged into factory plugs at the front bumper, then I suspect you need the headlight switch that came optional for your car. You will need to install a relay into the fuse box. Check for any fuses for that circuit. I did one on a Ford f-150 and the switch came with the lights from Ford.Usually the fog lights are not on until you push a button or turn the switch.
Just contact your local dealer and ask them for instructions for the OEM fog lamps. I have ordered Honda fog lamps, and you can usually find a pdf document on line with detailed instructions. The nice thing about Honda accessories, is the harnesses will only plug in one way. Hope this helps
Look under the dash near where the headlamp switch mounts and if yours is equipped you should see I think it is a blue 4 pin connector with the following wire colors OG,OG/WH,OG/GN,BK.
This is for the fog lamp relay.If yours has this connector then you will need to purchase a relay ford part number F6RZ-14N089-AA should list for about $10.
It's definitely the switch...I bought two of 'em so far...known bug. I don't use the fog lights as much anymore , but the "Airtex" oem equivalent switch from Rockauto seems to be holding up well. If you dissamble your broke switch you'll probably see evidence that it is beginning to melt and theres alot, maybe too much, grease, which may or may not have been the cause of the bad, heating contacts inside switch.
If I remember right, even though the foglights have a relay there is still full amperage going through the switch or something....don't qoute me on that last statement.