Billy Vance Posted March 1, 2022 Share Posted March 1, 2022 Where is the back up light switch located on a 2020 granite with the mdrive transmission Quote Link to comment https://www.bigmacktrucks.com/topic/69310-billy/ Share on other sites More sharing options...
Mackpro Posted March 2, 2022 Share Posted March 2, 2022 I don’t believe there is a reverse switch on a Mdrive like on the traditional manual transmissions. Being the truck is a 2020 it has a light control module (LCM) that gets a signal from the either the gear selector or transmission ECM to send voltage from the LCM to the reverse lights. Check all the LCM fuses in the fuse box on top of the dash , I believe there are at least 5 and possibly as many as 7 LCM fuses. Quote Link to comment https://www.bigmacktrucks.com/topic/69310-billy/#findComment-490718 Share on other sites More sharing options...
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