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Welcome, I'm Chris (aka Moose), my normal schedule online is around lunch and after dinner till early morning.
DO you have a volt meter and understand wire diagrams?
Here is your wire diagram.
Step one, at the headlight switch can you confirm the orange/yellow and orange/white wires to the same pin number in the connector have power with the headlight switch in park or head?
Please read this:
Thanks for using Just Answer, Chris
No problem, report back tomorrow when ready.
Since your not getting these results https://dl.dropboxusercontent.com/u/90220402/mainlight.png The first issue is the head light switch is bad. Unknown yet if there are wiring issues beyond the switch.
When the headlights are on, the switch powers these wires to illuminate the lamps you're not getting to turn on.
The switch is plugged up in this test. You are wanting to see if the switch is closing the internal contacts and using the power it is getting in and sending it back out on the different circuits. You push your meter probe in beside the wire to contact the end of the wire in the connector or push a paper clip in there so you can touch your meter probe to it.
Your guess is as good as mine on buying a used switch from ebay. We have all bought something used that turned out to be great and something that turned out to be a lemon.
One other test if you want is to use a paper clip and use the connector diagram. Connector plugged up or not. Jump from pin 11 to 13 then from 11 to 16 and verify the lights work.
That is odd you still had headlights with the fuse blown, I thought the only issue was the parking and interior lights.
Hello again Chris here,