Colomack Posted November 28, 2018 Share Posted November 28, 2018 New to the forum but have used the knowledge on here for a long time. I recently got a 1974 f model cabover and I can't get the brake lights to work but if I supply power to the wire off the turn signal switch that goes to the brakes I have lights, so I bet it's the brake light switch, but I can't find it! Any ideas? Quote Link to comment https://www.bigmacktrucks.com/topic/54907-1974-cabover-brake-light-switch-location/ Share on other sites More sharing options...
75T Posted November 28, 2018 Share Posted November 28, 2018 It might be in the panel where the brake valves are. Quote Link to comment https://www.bigmacktrucks.com/topic/54907-1974-cabover-brake-light-switch-location/#findComment-410219 Share on other sites More sharing options...
Colomack Posted November 28, 2018 Author Share Posted November 28, 2018 Under the cab on the driver's side? Quote Link to comment https://www.bigmacktrucks.com/topic/54907-1974-cabover-brake-light-switch-location/#findComment-410232 Share on other sites More sharing options...
Hobert62 Posted December 2, 2018 Share Posted December 2, 2018 My B model had it on the tractor protection valve behind the cab where the trailer airlines started from. Quote Link to comment https://www.bigmacktrucks.com/topic/54907-1974-cabover-brake-light-switch-location/#findComment-410536 Share on other sites More sharing options...
Colomack Posted December 7, 2018 Author Share Posted December 7, 2018 Thanks for the replies, I found it under the cab above the driver's side tire under a plate attached to the foot treadle valve. I am new to the older Mack's and was wandering if there is any way to get a wiring diagram for these things? Lots of fingers have been in the dash before me and it's a spaghetti mess, I need to know what it was supposed to be like so I can start sorting it out Quote Link to comment https://www.bigmacktrucks.com/topic/54907-1974-cabover-brake-light-switch-location/#findComment-410810 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.