Sandy Blackwell Posted December 7, 2014 Share Posted December 7, 2014 I was wondering if anyone had a fuse box diagram for a 98 mack CL 700. I am having some electrical issues and it would be helpful to know what is where. Not to push my luck but, a wiring diagram would be awesome too. I assume I have a wire touching the frame or another wire somewhere because when I turn my headlights on it throws the breaker and I loose my dash lights and tail/brake lights. Sometimes I can run for hours before it does it and sometimes it happens right off the bat. The roads I have been running lately are gravel and rough so I am sure it is nothing more that something loose, hopefully not in the dash. Quote Link to comment https://www.bigmacktrucks.com/topic/38010-electrical-issues-98-mack-cl-700/ Share on other sites More sharing options...
MACKS Posted December 8, 2014 Share Posted December 8, 2014 Look at the wire harness that goes to the head lights,start at the head lights and trace it back.i had a problem on my 96 cl with both sides right in the front of the truck just a foot or so from the head lights. Quote Link to comment https://www.bigmacktrucks.com/topic/38010-electrical-issues-98-mack-cl-700/#findComment-269540 Share on other sites More sharing options...
Dirtymilkman Posted December 8, 2014 Share Posted December 8, 2014 Or right where the wire harness bends by the hood hinge. I actually just replace the whole harness when.I start having trouble. They're $125 and headlights are kinda nice to have at all times. Quote Link to comment https://www.bigmacktrucks.com/topic/38010-electrical-issues-98-mack-cl-700/#findComment-269563 Share on other sites More sharing options...
Sandy Blackwell Posted December 24, 2014 Author Share Posted December 24, 2014 I appreciate the help. Found the problem, About 1' down from where the brake light is attached there was a bare spot in the wire. Quote Link to comment https://www.bigmacktrucks.com/topic/38010-electrical-issues-98-mack-cl-700/#findComment-271643 Share on other sites More sharing options...
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