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Ron
Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 33460
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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I have a 2010 f150 4 door ranch the rear defog doesn't work

Customer Question

I have a 2010 f150 4 door king ranch the rear defog doesn't work the dash indicator light is on and the side mirrors are working on heated mode ?
Submitted: 1 year ago.
Category: Ford
Expert:  Ron replied 1 year ago.

Hello and thank you for you question,

There are two fuse you need to check first to make sure they are not blown, check the F 43 fuse located in the interior fuse panel and the other is the F 32 fuse located in the under hood panel. If both fuse check okay then you are going to need to do some testing starting at the connector for the grid. I have enclosed the pinpoint test as well as the wiring diagram in the links below, copy and paste the links to your browser to open and view them.

https://dl.dropboxusercontent.com/u/104923897/Pinpoint%20test%20H%20Oct%2021.pdf

https://dl.dropboxusercontent.com/u/104923897/Defrost%20wiring%20Oct%2021.pdf

Post back if you have more questions and or need more help and we can work from there.

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