Heavy Rescue Mack MR688P Posted January 13, 2017 Share Posted January 13, 2017 Called to assist local fire department with sulfating battery concern. Heavy rescue MR688P model. 5 batteries mounted on roof of box. When we arrive, a member had attempted to unhook the batteries for us - but unfortunately we think he caused a dead short with by crossing cables in his haste to disconnect the batteries. We install new batteries - but nothing. There's no power getting from battery box to master disconnect. Somewhere there's a main fuse that he's melted - where is it? It's a Pierce body rescue truck, but this appears to be a Mack issue - any ideas? Help! Quote Link to comment https://www.bigmacktrucks.com/topic/48338-heavy-rescue-mack-mr688p/ Share on other sites More sharing options...
Mack458 Posted January 13, 2017 Share Posted January 13, 2017 I would think Pierce would have all schematics since they did the conversion. I would contact Pierce with the build and chassis number and ask for the electrical drawings. Quote Link to comment https://www.bigmacktrucks.com/topic/48338-heavy-rescue-mack-mr688p/#findComment-358163 Share on other sites More sharing options...
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