| Author | Message | ||
| Terry (T3rry)
Registered Member Username: T3rry Post Number: 31 Registered: 2-2010 Posted From: 67.211.76.74  Rating: N/A |
hey all, i am trying to diagnose a problem, my headlights and tail lights do not work, i have been doing some work on the tails, (because the back corner of the coach was damaged). i do have some wires loose back there, but nothing that i feel would have shorted out. anyways, i am trying to locate the main breaker/fuse for the lights, according to the manual it should be in the AC box in the front cargo area, however it's not there, i have an MC9 manual with an MC8 coach, so i suspect this could be why it's inaccurate, can anybody guide me to the right direction to find this fuse/breaker? (Message edited by t3rry on May 08, 2010) | ||
| Terry (T3rry)
Registered Member Username: T3rry Post Number: 32 Registered: 2-2010 Posted From: 67.211.76.74 Rating: N/A |
after a little more research i found it's only the BRAKE and headlights that are not working, signals, and running lights function fine. | ||
| John MC9 (John_mc9)
Registered Member Username: John_mc9 Post Number: 1139 Registered: 7-2006 Posted From: 74.162.78.188  Rating: N/A |
I would check again for a short at the rear brake lights, and/or for the proper type bulb in the brake light socket. Try disconnecting the wires from the brake bulb sockets, and see if the short clears. The breaker will trip with a short, and should re-set when the short is removed. The brake lights and headlights may be on the same circuit, since both can be on without the rest of the system. | ||
| Larry Nelson (Larryn4106)
Registered Member Username: Larryn4106 Post Number: 58 Registered: 8-2008 Posted From: 173.30.186.230 Rating: N/A |
This may have no bearing on an MCI but regarding the headlights, on my GM, it has a fog light switch next to the dimmer. If I accidently hit that, it kills my head lights. | ||
| Terry (T3rry)
Registered Member Username: T3rry Post Number: 33 Registered: 2-2010 Posted From: 67.211.76.74 Rating: N/A |
thanks for the suggestions, i got her licked, turns out it was a faulty brake light | ||
| Roger Baughman (Roger)
Registered Member Username: Roger Post Number: 164 Registered: 11-2006 Posted From: 69.232.65.89  Rating: N/A |
Terry, On my MCI9 the headlight relay and other electrical controls are in a panel just below the drivers side window. Open the outer door, then you will find a inter door that opens down wards. Inside ther you will find all sorts of interesting things. Glad you found your problem. When I am driving at night my head lights will go out and come back on for no apperant reason. | ||
| joe padberg (Joemc7ab)
Registered Member Username: Joemc7ab Post Number: 406 Registered: 6-2004 Posted From: 66.38.159.33 Rating: N/A |
Roger If your lights are going off and on for no apparent reason, I believe you might have an intermittant open or a circuit that is protected by a thermal breaker(fuse) that resets itself after cooling off,caused by drawing too much current. Joe. | ||
| Roger Baughman (Roger)
Registered Member Username: Roger Post Number: 165 Registered: 11-2006 Posted From: 69.232.65.89 Rating: N/A |
Joe, Doi you know were that thermo breaker might be on my MCI-9 1984? Thanks, Roger | ||
| joe padberg (Joemc7ab)
Registered Member Username: Joemc7ab Post Number: 408 Registered: 6-2004 Posted From: 66.38.159.33 Rating: N/A |
Roger I donot know because I donot have any manuals for a mc9. If you have a manual with a schematic diagram you might try to trace back from the headlights as a starting point. Good hunting!!!! Joe. | ||
| les marston (Les_marston)
Registered Member Username: Les_marston Post Number: 54 Registered: 1-2010 Posted From: 68.151.248.141 Rating: N/A |
Joe is right about the over load. I had the same problem with my 5 when I went from the old incandescent bulbs to quartz halogen headlights The circuit breaker in my 5 is in the panel to the left of the driver. I had to change it to a slightly heavier breaker If you haven't added any extra load to the head light circuit then you might start looking at each connection for corrosion before changing the thermal breaker. I found my breaker by listening for it. Good luck Les |