jeffl1107 Posted September 16, 2010 Share Posted September 16, 2010 Hey All,97 Mack RD688 Dump Truck. Got in this morning around 5:30am, turned the lights on and No Headlights. All other running lights work fine. The bulbs in headlights are brand new. All fuses seem to be ok. Any idea's what it could be. I had a late day and did not get back to just after dusk. Now I need to go down there early in the morning and try and get these damn things working for tomorrow. Any help greatly appreciated. Quote Link to comment https://www.bigmacktrucks.com/topic/15748-97-mack-rd688-no-headlights/ Share on other sites More sharing options...
counterman6 Posted September 16, 2010 Share Posted September 16, 2010 We often find that wires often break where the wiring harness flexes at the hood hinge area. You could peel back the loom and inspect them. They (the wires for the hood) also like to short to the frame in various places along the way. Quote Thanks,Philphil@globaltrucktraders.comwww.globaltrucktraders.com603-239-7008 Link to comment https://www.bigmacktrucks.com/topic/15748-97-mack-rd688-no-headlights/#findComment-63629 Share on other sites More sharing options...
jeffl1107 Posted September 16, 2010 Author Share Posted September 16, 2010 Hey All,97 Mack RD688 Dump Truck. Got in this morning around 5:30am, turned the lights on and No Headlights. All other running lights work fine. The bulbs in headlights are brand new. All fuses seem to be ok. Any idea's what it could be. I had a late day and did not get back to just after dusk. Now I need to go down there early in the morning and try and get these damn things working for tomorrow. Any help greatly appreciated.Ok, thanks for the info Phil, I will definately check that out tomorrow morning. Quote Link to comment https://www.bigmacktrucks.com/topic/15748-97-mack-rd688-no-headlights/#findComment-63632 Share on other sites More sharing options...
David Posted September 16, 2010 Share Posted September 16, 2010 If your not getting power to the harness check for power in and out of the switch. 13 years is about one life time for those switches. Quote Link to comment https://www.bigmacktrucks.com/topic/15748-97-mack-rd688-no-headlights/#findComment-63639 Share on other sites More sharing options...
counterman6 Posted September 16, 2010 Share Posted September 16, 2010 Talking with the techs this morning at break, they said to check to make sure the dimmer switch isn't stuck or broken and to check the headlight relay. Quote Thanks,Philphil@globaltrucktraders.comwww.globaltrucktraders.com603-239-7008 Link to comment https://www.bigmacktrucks.com/topic/15748-97-mack-rd688-no-headlights/#findComment-63657 Share on other sites More sharing options...
Dctrashman Posted September 16, 2010 Share Posted September 16, 2010 I would definatly check the dimmer swith in the floor board , i hav found them cauce the problem all the time Quote Link to comment https://www.bigmacktrucks.com/topic/15748-97-mack-rd688-no-headlights/#findComment-63663 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.