Trevor1978 Posted May 22, 2017 Share Posted May 22, 2017 I have a 1978 Mack R685ST and the turn signals do not work. When I turn the headlights on the headlights dont come on but the side marker lights do and so does the tail lights. I am lost and do not know what to look for any help would be nice. Quote Link to comment Share on other sites More sharing options...
Trevor1978 Posted May 23, 2017 Author Share Posted May 23, 2017 Anyone? Quote Link to comment Share on other sites More sharing options...
HarryS Posted May 23, 2017 Share Posted May 23, 2017 I would check the grounds and circuit breakers. In some cases the headlight switch has a built in circuit breaker. On my B model I had to use a separate ground wire for the front turn signals as they would not ground through the paint. Quote Link to comment Share on other sites More sharing options...
Trevor1978 Posted May 23, 2017 Author Share Posted May 23, 2017 Ok thank you I will see what I can find Quote Link to comment 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.