hauling Pete Posted June 9, 2014 Share Posted June 9, 2014 Ive been working on a 2012 MR. Its been to the dealer for this problem under warranty, but now warranty is over. The problem will start out with the circuit breaker for the marker lights will pop then reset. But my major problem is in the dash lights, it keeps burning out headlight switches. Ive narrowed it down to dash lights. If i power up the wire for dash lights with a power probe all my switches will light up for 2 seconds(breaker on the probe pops), no gauge back lighting. If I plug in a new switch it burns out the dash light circuit in the new switch. any advice will help. Thanks Pete Quote Link to comment https://www.bigmacktrucks.com/topic/36004-mr-dash-light-problem/ Share on other sites More sharing options...
2 STICK PUPPY Posted June 9, 2014 Share Posted June 9, 2014 Check the dash light dimmer switch Quote Link to comment https://www.bigmacktrucks.com/topic/36004-mr-dash-light-problem/#findComment-248646 Share on other sites More sharing options...
hauling Pete Posted June 9, 2014 Author Share Posted June 9, 2014 its part of the headlight switch. Quote Link to comment https://www.bigmacktrucks.com/topic/36004-mr-dash-light-problem/#findComment-248647 Share on other sites More sharing options...
2 STICK PUPPY Posted June 9, 2014 Share Posted June 9, 2014 Yeah you are right ... I forgot you have the new version dash Quote Link to comment https://www.bigmacktrucks.com/topic/36004-mr-dash-light-problem/#findComment-248651 Share on other sites More sharing options...
hatcity Posted June 10, 2014 Share Posted June 10, 2014 sounds like a short in the system somewhere.trace all wires to see any black/scorched areasany places that wires may be rubbing against metalcould also be two wires crossing and popping breaker Quote Success is only a stones throw away.................................................................for a Palestinian Link to comment https://www.bigmacktrucks.com/topic/36004-mr-dash-light-problem/#findComment-248691 Share on other sites More sharing options...
hauling Pete Posted June 10, 2014 Author Share Posted June 10, 2014 Thats what i was figuring. I only have 1 day a week to work on it. Unfortunately this truck is double shifted 6 days a week. One of the drivers likes to drink coffee with no cover on his cup, so everything under the center console is covered in goo. Ive tried using my fault finder, no luck there. I was hopping there is a common spot under the dash someone knows about. lol . im not that lucky. Quote Link to comment https://www.bigmacktrucks.com/topic/36004-mr-dash-light-problem/#findComment-248741 Share on other sites More sharing options...
wheeler73 Posted June 11, 2014 Share Posted June 11, 2014 I have found a lot of shorts in the roof wiring of MRU's. More than I care to have found. I would look there. Quote Link to comment https://www.bigmacktrucks.com/topic/36004-mr-dash-light-problem/#findComment-248814 Share on other sites More sharing options...
hauling Pete Posted June 11, 2014 Author Share Posted June 11, 2014 I'll look ther on monday when i get the truck back. Quote Link to comment https://www.bigmacktrucks.com/topic/36004-mr-dash-light-problem/#findComment-248883 Share on other sites More sharing options...
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