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We are in Canada and have no low beams or drl on our gu813…

Customer Question
Hello we are in...

Hello we are in Canada and have no low beams or drl on our gu813 2013

Mechanic's Assistant: What's the make/model/year of your truck? Engine type?

Mack granite 2013 mp7 engine

Mechanic's Assistant: Are you fixing your truck yourself? What have you tried so far?

I have the diagrams, tried to replace light main switch (not that), tried DRL module from a 2014 (not that) ...but if i take out my low beam relays and cotter pin the circuit my lamps light

Mechanic's Assistant: Anything else you want the Truck Mechanic to know before I connect you?

My main switch has power coming out of pin A for the low beam circuit but it wont activate the relays

Submitted: 2 years ago.Category: Medium and Heavy Trucks
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Customer reply replied 2 years ago
HelloMack Granite(###) ###-####we have no low beams and no DRL , high beams and flash to pass working.
Customer reply replied 2 years ago
found my problem, ground circuit for relay 97,98 is bad inside relay center on printed circuit board
Answered in 4 hours by:
2/26/2020
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 2 years ago
Mike Mcmillan
Mike Mcmillan, Shop Foreman/Triage Tech
Category: Medium and Heavy Trucks
Satisfied Customers: 6,627
Experience: Volvo/Mack Master Tech, Certified with Cummins, Eaton, GM, Hino, Detroit Diesel
Verified
Hello and thank you for using Just Answer. My name is ***** ***** I’d like to try and help. I am sorry that you are having issues with your truck. I know this can be frustrating. On your issue, make sure the relay contacts are tight because that can cause this board can burn out. This is caused from vibration and a loose connection. We have also had issues with the relays keep triggering and causing excessive load on the board as well. I hope this helps. Thank you.
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Mike Mcmillan
Mike Mcmillan
Mike Mcmillan, Shop Foreman/Triage Tech
Category: Medium and Heavy Trucks
Satisfied Customers: 6,627
6,627 Satisfied Customers
Experience: Volvo/Mack Master Tech, Certified with Cummins, Eaton, GM, Hino, Detroit Diesel

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