# 2017 RAM 2500 - Can I add rear defrost?

**URL:** <https://community.cartalk.com/t/2017-ram-2500-can-i-add-rear-defrost/170902>\
**Category:** Maintenance/Repairs\
**Tags:** ram\
**Created:** [October 6, 2020, 5:24pm UTC](https://community.cartalk.com/t/2017-ram-2500-can-i-add-rear-defrost/170902 "2020-10-06T17:24:12Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![WilliamBryden](https://avatars.discourse-cdn.com/v4/letter/w/a698b9/32.png) [@WilliamBryden](https://community.cartalk.com/u/WilliamBryden)\
**Post date:** [October 6, 2020, 5:24pm UTC](https://community.cartalk.com/t/2017-ram-2500-can-i-add-rear-defrost/170902/1 "2020-10-06T17:24:12Z")

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I just had a non rear defrosting window replaced and they only had the window with the defroster already incorporated in the window. Is there a way to actually hook this up so it works?

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**Author:** ![davepsinbox\_157004](https://avatars.discourse-cdn.com/v4/letter/d/73ab20/32.png) [@davepsinbox\_157004](https://community.cartalk.com/u/davepsinbox_157004)\
**Post date:** [October 6, 2020, 9:23pm UTC](https://community.cartalk.com/t/2017-ram-2500-can-i-add-rear-defrost/170902/2 "2020-10-06T21:23:08Z")

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It seems like it should be possible, just some wire, a fuse and a switch, right? Your fuse block probably already has a slot for the fuse. But in my limited experience US vehicles generally have the rear defroster on a timer, presumably the body control module. You might risk cracking the glass if you leave it on too long.