All Bay Lights are INOP.

[LarryB]

I returned home from service to find all the bay lights inoperative. Of course, the service people didn't touch it and have no idea why they don't work.
The Breaker has been reset and is in, I checked for power there as well. The circuit seems rather simple, not a lot of components, just power, breaker, lights.
On my CC the breaker is in the compartment outside, under the drivers side window. There is a light in that compartment that does work and is on the bay lights circuit.
Another thing I noticed is the row of light switches in the gray/black tank dump bay are turned off by pushing the plunger switch that is activated by closing the bay door. Not sure if this is normal or not. Would some fellow CC please check to see if that condition is the same on their bus?

I hate being stumped by these sort of problems, they usually turn out to be something rather simple.

[JIM KELLER]

Larry, Yes closing bay doors turns off the row of switch lights in the plumbing bay and the front bay passenger side. With that in mind, there is a switch in the switch row of the front bay and another one in the switch panel next to the passengers seat that will turn off bay lights. Hope this helps.

[LarryB]

Jim, thanks, it does help. Now I know all is functioning properly. Now just need to find the reason there is no power to the lights. Something is open some place.

[Gil_J]

Larry, the light in the panel under the driver's window is a Prevost light and is not assiciated with the bay lights. The same is true of the engine bay lights; they are Prevost lights. As Jim stated there are 2 switches that will switch the bay lights. If either is green when the panel lights are on the bay lights are switched on. Each light has its own switch on the light fixture. These should be left on. The bay lights, like most everything else, is controlled through the ECC--that large electrical panel in bay 1. The two switches go to one of the controller boards in the ECC that then applies power to the bay lights.

Do you have the electrical diagrams for the ECC? If not, I'll look up which board controls the lights.

[LarryB]

Gil., no I don't have the diagrams, if you could look up the board I would sure appreciate it. I understand about the light switching and have had properly working light in the past. As to the Prevost light in in the fwd panel, my CB #52 is labled to control the bay lights, when opened that CB turns off the Prevost light as well as the bay[if they were working.] I checked the mother board fuses and breakers and all seem OK.

[Repoer]

I am no electric wizzard but in the past i have had problums with the bosh type relay locakate the relay for the lights and
replace with a new one at worst you will have a spare one some are 12v some are 24v. Just an idea i have had relay problums on my bus my mower my car some times they just conkout.

[LarryB]

Repoer, as I read the diagram, there are no relays in the bay door light circuit. Thanks for the idea however.

[JIM CHALOUPKA]

Check the voltage at a light to be sure the bulb is good, next check the voltage at the switch. If you get the electrical diagram you can go from there.

Something tells me you did not bird dog the technician during service. Bad, bad, bad!

JIM

[JIM KELLER]

Larry, I'm thinking and thinking. There has to be an easy fix to this. 1. If you open all cargo bay doors on both sides are the lights out in every bay ? 2. When you activate the cargo light switch does one of the red lights start blinking on the mother board ?

[LarryB]

Jim, There is no voltage to the lights,[all11 of them] the bulbs are OK. Yes a diagram would be nice. As to monitoring the service techs, there were 3 of them and I only have 2 eyes <G>. I'm sure something was screwed up.

[JIM KELLER]

Larry, Just went out and looked at mine. 5th card from the left, bottom bulb lights red when I push the bay light switch in. Fuse sits sideways right under the light.

[LarryB]

Jim, thanks. I just looked at the 5th board and the red light comes on when bay lights are selected on. The fuse below the card is good and ALL fuses in M/B eyeball good.
Just have to have an open just prior to the lights, they each have their own ground I believe.

[Gil_J]

Jim is correct. The lower green LED on card 5 should be on. When the bay light switch is on the red LED next to he one should also light.

[LarryB]

Gil, our posts crossed in the night. As I posted, my system so far, functions as Jim discribed. Guess I'll have to cut off a chickens head and throw a bunch of bones in the fwd bay to turn on my bay lights.

[normancasson]

The last time that happened to me I ran a wire with a fuseable link in it for protection from the power source to the first light-it worked. I then found a chewed wire from some critter- fixed it and all was well-except I never found the critter.

[LarryB]

Thanks for the info Norm[?]. I may just try your fix, as I have been unable to find the 'open' in the circuit.

[Reagan Sirmons]

I will add a dumb observation to this. If I had this issue, I would look at the major board in the front bay to see if any lights on the bottom row are anything but green or off. If so, is it possible there is a fuse out on the board on the bottom row?
Pres

[LarryB]

Pres, I have confirmed that per Jim Kellers post. All appropriate lights are on, all fuses check OK and, power is present on the wire coming out of the 'Mother Board'. I'm thinking the 'open' is between the MB and the first light in the bay, just can't seem too locate it.

Thanks for the input!