Tracy Stone Posted August 23, 2015 Share Posted August 23, 2015 Ok I had a bad brake switch when I brought this truck replaced it with new switch when I hit the brake the brake lights come on for a second then go off it was doing the same with the busted switch this thing has me stumped any help would be appreciated Quote Link to comment https://www.bigmacktrucks.com/topic/41471-98-mack-brake-switch/ Share on other sites More sharing options...
Dieselwrenches Posted August 23, 2015 Share Posted August 23, 2015 If it's on a circuit breaker fuse then you could have a short on the wiring and with application if brakes it quickly overloads circuit before tripping fuse. Quote Link to comment https://www.bigmacktrucks.com/topic/41471-98-mack-brake-switch/#findComment-301125 Share on other sites More sharing options...
Tracy Stone Posted August 23, 2015 Author Share Posted August 23, 2015 Ok where should I start lol Quote Link to comment https://www.bigmacktrucks.com/topic/41471-98-mack-brake-switch/#findComment-301130 Share on other sites More sharing options...
Tracy Stone Posted August 23, 2015 Author Share Posted August 23, 2015 Ok should there be power to brake switch and all the wires to the three switchs under dash were pulled down trying to decide which wire goes where and the old brake switch was broke in half but the brakes are still doing same and thanks so much for you help Quote Link to comment https://www.bigmacktrucks.com/topic/41471-98-mack-brake-switch/#findComment-301135 Share on other sites More sharing options...
Dieselwrenches Posted August 23, 2015 Share Posted August 23, 2015 What year and model truck do you have? Quote Link to comment https://www.bigmacktrucks.com/topic/41471-98-mack-brake-switch/#findComment-301194 Share on other sites More sharing options...
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