'85FC31 Security Light issue... update!

[pattypape]

Jr,

This is going to require the use of your major detective skills.
Even your electrical drawings may not help.
look for frayed wires in the troubled circuits, check the lights
sockets/bulbs, that seem to cause this trouble.
look closely at the bay doors that open and close, possibly a
short or pinched wire at the docking lights.....??????....
Bosch relays are very reliable, They just plug into a socket
so try to substitute a known good relay.
Disconnect lights until the problem goes away,,,,,

"when the issue is triggered: Top two A/C packs are inoperative;
> Water-pump is inop; Dash radio is inop; Microwave works; Engine,
> headlights and driving lights work; Digitell works."

In your statement are you referring to the roof Air Conditioners???
And Microwave............
The AC voltage and the DC voltage are isolated from each other.
Two different animals...............

Bill 88 FC Michigan


--- In WanderlodgeForum@yahoogroups.com, "James" wrote:
>
> Thanks to all for the advice and I have an update on the issue as it
> is not solely associated with just the security light switch.
>
> 1) I have narrowed the cause of the problem to just the front and
rear
> landing lights. I was incorrect in my original diagnosis when I
said I
> could toggle all of the lights individually. Driving lights and rear
> parking lights toggle without issue. However, both the front and
rear
> lights trigger the issue.
>
> 2) To answer Jim's question, the issue occurs on battery power, when
> using the generator and when plugged into shore power. All batteries
> were replaced with mew Trojan T-105 in Nov '07. All individual
> batteries check out with 6V+, system is 12V+ and the grounds are
> solid. Even when I lose power, the batteries meter out a solid
12V+,
> almost like they're isolated from the whole issue.
>
> 3) As Bill suggested, I tried removing the relay for the front
landing
> lights (both solenoid and relay located in the left rear load center
> above driver's side bed), toggled the dash switch and lost power
> throughout the coach again.
>
> 4) Gregory asked about the possibility of the issue being a
duplicate
> of the results from triggering the AT switch. However, the AT
switch
> does not kill the coach lighting system and I am able to start and
> operate the engine without problem.
>
> 5) Here is a list of other things within the coach that work and
don't
> when the issue is triggered: Top two A/C packs are inoperative;
> Water-pump is inop; Dash radio is inop; Microwave works; Engine,
> headlights and driving lights work; Digitell works. Everything that
> is inop when issue is at hand comes back to life when the system
> "resets" itself.
>
> 6) The lights are OEM and were never upgraded to a brighter set.
>
> I am not an electrician, nor did I sleep at a Holiday-Inn Express
last
> night. I can scan in my load center schematics if that would help
> anyone who is.
>
> The rear landing light solenoid and relay are located in the left,
> front load center (mid-coach, over the driver's side couch, next to
> the Master Electronics shut-off switch) which raises a question.
The
> chances of having two relays or two solenoids being bad at two
> different load centers seem to be statistically very small.
>
> Therefore, is there a common power feed to the landing light sets
that
> might be grounding? If so, where might it be? Basically, what is
> causing the instant power kill and then the time delay before it
> resets? Alternatively, where else could my Gremlin be living?
>
> Thanks to everyone,
> Please call me "JR"
> '85FC31-SB aka: "The Short Bus"
>