Zeuz Posted March 31, 2023 Share Posted March 31, 2023 Hey ,I'm having trouble with my 2011 mack ,the turn signals won't work,radio,cb,and the dash lights don't turn on.but if I turn my headlights off the center of my dash lights light up..the control center with the amps,miles etc come on and off..the other day my batteries went dead I replaced them and put new alternator and everything worked fine ,but I'm having this problem...anyone know what can it be...my driver says all fuses are good.thanks Quote Link to comment https://www.bigmacktrucks.com/topic/72671-mack-electric-problem/ Share on other sites More sharing options...
Joey Mack Posted April 1, 2023 Share Posted April 1, 2023 was the starter recently replaced? this seems like a bad ground and/or back feed issue.. have you checked the ground wire connections in the cab and on the firewall? Those wires are gray.. Quote Link to comment https://www.bigmacktrucks.com/topic/72671-mack-electric-problem/#findComment-528277 Share on other sites More sharing options...
Zeuz Posted April 1, 2023 Author Share Posted April 1, 2023 No the starter hasn't been replaced at all ..my driver just called and said he got no dash lights ,still no turn signal or radio no cruise control...but if he turns head lights off the rpm and speedo gauge lights up...the only thing done to that truck in the last 2 weeks is it wouldn't go over 55 and mechanic eliminated the protection mode on it couldn't find what was wrong or just being lazy... Quote Link to comment https://www.bigmacktrucks.com/topic/72671-mack-electric-problem/#findComment-528278 Share on other sites More sharing options...
Joey Mack Posted April 1, 2023 Share Posted April 1, 2023 OK.. this has just gone passed my knowledge... Others here will be better help.. Jojo Quote Link to comment https://www.bigmacktrucks.com/topic/72671-mack-electric-problem/#findComment-528279 Share on other sites More sharing options...
Zeuz Posted April 1, 2023 Author Share Posted April 1, 2023 No the starter hasn't been replaced at all ..my driver just called and said he got no dash lights ,still no turn signal or radio no cruise control...but if he turns head lights off the rpm and speedo gauge lights up...the only thing done to that truck in the last 2 weeks is it wouldn't go over 55 and mechanic eliminated the protection mode on it couldn't find what was wrong or just being lazy... Quote Link to comment https://www.bigmacktrucks.com/topic/72671-mack-electric-problem/#findComment-528280 Share on other sites More sharing options...
mechohaulic Posted April 1, 2023 Share Posted April 1, 2023 based on ole school, I agree with the bad ground JoJo. but that would be for the lights acting f--ked up . that wouldn't kill the batteries . 2011 is way tooo new for me to know the electrical system. batteries going dead would lead to relay/ module /open circuit with key off. honestly I never knew of a "protection mode. will defiantly be watching for a cure on this one for new day knowledge. Quote Link to comment https://www.bigmacktrucks.com/topic/72671-mack-electric-problem/#findComment-528281 Share on other sites More sharing options...
Joey Mack Posted April 1, 2023 Share Posted April 1, 2023 there is always a power draw, because of the on-board computers.. also, when I here of ANY kind of delete, on these P.O.S. Volvo-Macks... I already need to walk away... Too many of todays diesel guys, are You-Tube trained and think that every repair is some bigass major repair, and overlook the normal, use your hands type repairs, like checking ground wire connection quality... The use of computers has a place in diag. 30 years now... but good ole' LOOKING at it how you fix it.. and with all the electronics,, grounds play a HUGE roll in smooth operation.. anyway, just my crappy 2 cents worth... and more reasons why I left the dealership to get away from these P.O.S. computers on wheels.. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72671-mack-electric-problem/#findComment-528282 Share on other sites More sharing options...
mechohaulic Posted April 1, 2023 Share Posted April 1, 2023 you should have been around when alternators FIRST came in to use on big trucks from factory. there was a major constant electrical draw. new trucks at the dealer could stay on the front line for weeks , cold or warm weather , turn key they would start right up:::: IF THEY HAD A GENERATOR. alternator set up batteries were dead in few days. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72671-mack-electric-problem/#findComment-528284 Share on other sites More sharing options...
mechohaulic Posted April 1, 2023 Share Posted April 1, 2023 8 minutes ago, Joey Mack said: there is always a power draw, because of the on-board computers.. also, when I here of ANY kind of delete, on these P.O.S. Volvo-Macks... I already need to walk away... Too many of todays diesel guys, are You-Tube trained and think that every repair is some bigass major repair, and overlook the normal, use your hands type repairs, like checking ground wire connection quality... The use of computers has a place in diag. 30 years now... but good ole' LOOKING at it how you fix it.. and with all the electronics,, grounds play a HUGE roll in smooth operation.. anyway, just my crappy 2 cents worth... and more reasons why I left the dealership to get away from these P.O.S. computers on wheels.. on my 1/25th scale builds , the computers are disconnected to save battery power LOL 2 Quote Link to comment https://www.bigmacktrucks.com/topic/72671-mack-electric-problem/#findComment-528286 Share on other sites More sharing options...
Joey Mack Posted April 1, 2023 Share Posted April 1, 2023 Mech,, I was wondering about that just a minute ago.. It's good that you posted the fix... jojo 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72671-mack-electric-problem/#findComment-528287 Share on other sites More sharing options...
fjh Posted April 1, 2023 Share Posted April 1, 2023 Edpm check the fuses and breakers next to the clutch pedal for green ness! Just something to look for! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72671-mack-electric-problem/#findComment-528288 Share on other sites More sharing options...
Joey Mack Posted April 1, 2023 Share Posted April 1, 2023 FJH,, there was a delete that I never heard of, have you heard of it?? 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72671-mack-electric-problem/#findComment-528289 Share on other sites More sharing options...
fjh Posted April 1, 2023 Share Posted April 1, 2023 no bro no delete to my knowledge Quote Link to comment https://www.bigmacktrucks.com/topic/72671-mack-electric-problem/#findComment-528307 Share on other sites More sharing options...
Joey Mack Posted April 1, 2023 Share Posted April 1, 2023 what does eliminating the 'protection mode' his mechanic did mean? Quote Link to comment https://www.bigmacktrucks.com/topic/72671-mack-electric-problem/#findComment-528310 Share on other sites More sharing options...
mechohaulic Posted April 1, 2023 Share Posted April 1, 2023 eliminated the "protection mode " possibly another way of saying :: I didn't fix anything , but here's the bill. if there is an electrical situation; why would some one eliminate any safety devices ?? 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72671-mack-electric-problem/#findComment-528312 Share on other sites More sharing options...
fjh Posted April 1, 2023 Share Posted April 1, 2023 In defense of the tech dude we have all been there with this electrical shit you can spend alot of time chasing ghosts! If dumping the protection mode got the unit workable maybe he did him a favor! Duno! there are so many dam parameters in that programing stuff Its hard to know if something hadn't got corrupted! 2 Quote Link to comment https://www.bigmacktrucks.com/topic/72671-mack-electric-problem/#findComment-528316 Share on other sites More sharing options...
Joey Mack Posted April 1, 2023 Share Posted April 1, 2023 Well put FJH... Quite Diplomatic if I may say so.. Quote Link to comment https://www.bigmacktrucks.com/topic/72671-mack-electric-problem/#findComment-528327 Share on other sites More sharing options...
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