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Drl relays on 2021 Mack granite


Troydye70

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3 hours ago, tjc transport said:

my 05 had the relay in the fuse box. pulled it out and no more DRL's

Where is that located at under the dash or what location if you can help 

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1 hour ago, Mackpro said:

In the top fuse box. Towards the left by the flasher. See the DRL in pic , bottom left 

2B3982AB-CAD8-4130-A639-378EA4DC6CFF.jpeg

Yea that does not look anything like I have got none of the relays are marked and even in the book diagram has nothing mentioning Drl relay just 6 different fuses for lighting control and I pulled them all at 1 time and then each individual  and nothing shut them off could this be a ecm thing or dealer has to change 

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1 minute ago, Troydye70 said:

Yea that does not look anything like I have got none of the relays are marked and even in the book diagram has nothing mentioning Drl relay just 6 different fuses for lighting control and I pulled them all at 1 time and then each individual  and nothing shut them off could this be a ecm thing or dealer has to change 

 

image.jpg

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Your correct , I forgot that the GR , Athem and Pinnacle all use the LCM light control module now. There are about 6 fuses for the LCM . We have never found out what fuse does what. I’m thinking it’s a parameter in the LCM that can be turned off with Tech Tool. 

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