biffidun Posted September 24, 2011 Share Posted September 24, 2011 Hi everyone, I have just picked up my first Mack for around the farm. A 1976 DM685S (I think). Anyway, the previous owner was a hack and has all the wiring messed up. I have been reviving the gauges one at a time. Trouble is, the reverse lights will not activate. Wiring at the lights checks out (amazingly), so I am trying to find the reverse switch in the transmission. It is a 5 speed maxitorque. Any hints?I also have a question about the pufflimiter, but I'll post that in a different thread.Regards. Quote Link to comment https://www.bigmacktrucks.com/topic/20739-no-reverse-lights/ Share on other sites More sharing options...
joes mack Posted September 24, 2011 Share Posted September 24, 2011 the switch should be on the top cover to the rear and right of the shifter looking down through the floor...joe Quote Link to comment https://www.bigmacktrucks.com/topic/20739-no-reverse-lights/#findComment-86748 Share on other sites More sharing options...
biffidun Posted September 24, 2011 Author Share Posted September 24, 2011 thanks I'll have a look Quote Link to comment https://www.bigmacktrucks.com/topic/20739-no-reverse-lights/#findComment-86797 Share on other sites More sharing options...
biffidun Posted September 27, 2011 Author Share Posted September 27, 2011 no sign of an electrical connection anywhere. Any ideas? Anyone have a photo or a schematic of this transmission? 5 speed maxitorque. Quote Link to comment https://www.bigmacktrucks.com/topic/20739-no-reverse-lights/#findComment-87062 Share on other sites More sharing options...
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