MCI 102c3 No headlights or Brake Light

Jcparmley · January 17, 2023, 07:59:05 AM

Hello All
I have been working on getting my bus back on the road after sitting for over a year. I've had air leaks, no power to the main switch and dash, and no headlights and break lights.

I fixed the air leaks. Got the dash power back by manually activating the master relay. But I still don't have headlights. Low beam and high beam. I do not get the brake light on the dash. I tried switching the ice cube relay but that didn't work. My electric schematic is blurry and difficult to read so I am having trouble following the circuit. You're thoughts?

luvrbus · January 17, 2023, 08:18:41 AM

On Tom's C-3 the head lights and brake lights are pull from the Vanner above the starting batteries, if you have the center tap for 12 v if you hook it up wrong it will blow the lights check your bulbs 1st to rule those out ,if you have 12+ volts at the plug with a meter then the headlights are shot

chessie4905 · January 17, 2023, 09:24:56 AM

If no luck there, check dimmer switch. They can act up from extended sitting. Cycle several times to see if the issue.

luvrbus · January 17, 2023, 09:59:41 AM

Did you get the brakes released? nothing to do with the lights but was wondering?

niles500 · January 18, 2023, 10:41:24 AM

Did you reset circuit breaker on vanner?

Jcparmley · January 18, 2023, 06:24:45 PM

I did not reset the breaker on the vanner. I will try that.

Quote from: niles500 on January 18, 2023, 10:41:24 AM
Did you reset circuit breaker on vanner?

Busted Knuckle · January 20, 2023, 11:10:56 AM

That was my thought too Niles!

BK

Tedsoldbus · January 22, 2023, 02:35:37 PM

When my headlights died, it was the foot dimmer switch. And NAPA had one! I thought that would be a junk yard easter egg hunt. I miss those old things. Wish I had one in my F 150.

chessie4905 · January 22, 2023, 03:55:50 PM

easy to add one. Just do it.

tr206 · January 22, 2023, 05:46:10 PM

FYI Brake lights won't work without air either if you didn't already know.

Busted Knuckle · January 24, 2023, 12:39:37 PM

Quote from: tr206 on January 22, 2023, 05:46:10 PM
FYI Brake lights won't work without air either if you didn't already know.

Not ALWAYS true! Many times brake lights won't go out w/o air to release the brakes!

BK

tr206 · January 24, 2023, 04:53:38 PM

Quote from: Busted Knuckle on January 24, 2023, 12:39:37 PM
Not ALWAYS true! Many times brake lights won't go out w/o air to release the brakes!
BK

I guess you got me there. But you still need air for them to work one way or the other.

Busted Knuckle · January 27, 2023, 09:18:47 AM

Quote from: tr206 on January 24, 2023, 04:53:38 PM
I guess you got me there. But you still need air for them to work one way or the other.

And on that you are 100% correct!

BK