Hyway3 Posted August 24, 2019 Share Posted August 24, 2019 I'm stumped 2004 Vision CX613 Brake lights turn signals back up lights work as they should, but no tail lights. Ran the length of tractor from the front to the back looking for broken or corroded wires the rear harness going to tail lights looked bad so i changed it out , lights came on for a few minutes then Went Out Again all bulbs still good any ideas Thanks Quote Link to comment Share on other sites More sharing options...
JoeH Posted August 24, 2019 Share Posted August 24, 2019 Bad grounds Quote Link to comment Share on other sites More sharing options...
fjh Posted August 24, 2019 Share Posted August 24, 2019 swap out the breaker on that circuit if its on a breaker sounds like you were close 1 Quote Link to comment Share on other sites More sharing options...
Hyway3 Posted August 24, 2019 Author Share Posted August 24, 2019 Afternoon JoeH check all grounds cleaned up still same issue. FJH when u say breaker u mean in the dash board all looked fine in there . When truck has been shut down for a few hours, and you start it up there on but shortly after they go back out . Quote Link to comment Share on other sites More sharing options...
JoeH Posted August 25, 2019 Share Posted August 25, 2019 Do they come back on when breaker resets? 1 Quote Link to comment Share on other sites More sharing options...
Hyway3 Posted August 25, 2019 Author Share Posted August 25, 2019 Yes if the truck is shut off for a few hours , when you start it up u have tail lights for a short period of time then they go out again Everything else works as they should turn signals brake lights back up lights just the tail lights are funky. Quote Link to comment Share on other sites More sharing options...
HeavyGunner Posted August 25, 2019 Share Posted August 25, 2019 Like it’s been said above change the breaker. Sounds like it isn’t working correctly. Quote The problems we face today exist because the people who work for a living are outnumbered by the people who vote for a living.The government can only "give" someone what they first take from another. Link to comment Share on other sites More sharing options...
JoeH Posted August 25, 2019 Share Posted August 25, 2019 Or change your break light fixtures. LEDs? They go bad. Quote Link to comment Share on other sites More sharing options...
Hyway3 Posted August 25, 2019 Author Share Posted August 25, 2019 Heavy Gunner when you say the breaker the one in the fuse box in dash board JoeH the tail fixtures them selves are new as well as the harness there not LED there factory original mack parts. Quote Link to comment Share on other sites More sharing options...
1965 Posted August 25, 2019 Share Posted August 25, 2019 Most of those breakers are the same; swap them around & see if that fixes it. If does that breaker is weak. Mark it with something so you know which is which Quote Link to comment Share on other sites More sharing options...
Hyway3 Posted August 25, 2019 Author Share Posted August 25, 2019 ok all try that appreciate the help i was thinking if there weak they pop Quote Link to comment Share on other sites More sharing options...
Hyway3 Posted August 26, 2019 Author Share Posted August 26, 2019 Went back to the breaker panel in the dash all is good no breaker for tail lights there is a 20 amp fuse but its fine Still no tail lights i am stumped Quote Link to comment Share on other sites More sharing options...
RayRay Posted February 25, 2021 Share Posted February 25, 2021 I am having the EXACT same problem with rear marker lights on 2014 Pinnacle. They might go on, then flicker a few times, then usually go out. In this condition I put a meter on the feed and it reads about 5 volts. i can’t find the issue. Did you figure a solution to this? Thanks, Ray Quote Link to comment Share on other sites More sharing options...
MackTech Posted April 8, 2021 Share Posted April 8, 2021 Did you replace the actual terminals in the connector or just the plastic part? The female part of the terminal could be losing connection. It's been too long ago since I worked on wiring to remember what circuit to look at, but if grounds are good, check the terminals. Quote Link to comment Share on other sites More sharing options...
Danthemanzee Posted May 6, 2021 Share Posted May 6, 2021 I’ve had this problem with an older mack. It was a relay (5 pin) : ‘; couldn’t tell you how to locate on your truck. I replaced them all one by one. They were cheap on Amazon Quote Link to comment Share on other sites More sharing options...
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