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Old 12-01-2017, 10:37 PM   #1
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running overhead lights with engine off

I had read that one of the electrical panels (thing that wires connect to) was for things that need the bus to be running and other for things that don't require it, however nothing works on my bus without it running. SO does one need to add a new panel and connect it directly to the battery in order to get say the overhead lights to work with the engine off? I have two, huge batteries and with LED lights assume I could run the lights a lot without impacting the batteries. Thanks.
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Old 12-01-2017, 10:43 PM   #2
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What position was the ignition key in when you tried this?

John
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Old 12-01-2017, 11:49 PM   #3
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Yes, still no lights unfortunately, just screaming air brake warning sound. Hoping to have lights with no key (or alarms) required.
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Old 12-02-2017, 10:36 AM   #4
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Many buses use an ignition triggered solenoid to operate other power needs. It reduces the power that the switch needs to carry. Find that solenoid and
disconnect the wires that you don't want going thru the ignition. Run those straight to battery
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Old 12-02-2017, 10:46 AM   #5
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Quote:
Originally Posted by druidwood View Post
Yes, still no lights unfortunately, just screaming air brake warning sound. Hoping to have lights with no key (or alarms) required.

You never came close to answering about the key? Do you need help or not?

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Old 12-02-2017, 11:14 AM   #6
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Sorry John, kept losing my messages, the answer is yes I did try with the key in the ignition in the on, but not start position and the lights still did not work.
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Old 12-02-2017, 11:21 AM   #7
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Thanks for info. Do you know if there are usually any connectors already coming right off the battery in the panel box? Or are all those connections in the panel box running from the engine's power and have nothing to do with the battery?
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Old 12-02-2017, 02:41 PM   #8
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Does your ignition have an accessory position? Try that first. They do come on when the engine is running?

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Old 12-02-2017, 02:45 PM   #9
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inside the electrical panel of my bus are 3 power bars.. each power bar has a row of silver circuit breakers.. most all of them are 20 amps.. one row is BAT+. meaning it has power at all times...(this is where you wire in things you want to be always powered.. ie charge port for phones, maybe a light?, clock, etc) one row is energized by a solenoid for when the key is on the ACC (accessory) position.. and the last row is for items that operate when the key in the 'RUN' position..it is also a solenoid to turn this on. (items on the ACC bar will operate when key is in Run). so you connect to whichever bar you like..

my solenoids have 2 Big wires on them and 2 little wires.. One big wire goes to the Battery.. this wire should have power all the time.. its easy to spot as fro mthe solenoid it appears to go down into the body..

the other Big wire goes to the bar with all of the circuits on it... this Onlty has power when the solenoid is energized...

one little wire is connected to the bus body.. (ground)... the other little wire goesoff into the harness.. if you turn your key to run, you should be able to measure voltage across both little wires with a meter.. and you should be able to measure voltage from your circuit bar to ground.. if you have power across the little wires but only on one Big wire then the solenoid is bad.. the solenoid will likely be a round "can" about 2 " in diameter by maybe 2" tall . they make a definite "snap" sound when you turn on the power.

-Christopher
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Old 12-02-2017, 02:50 PM   #10
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You will not need a new "panel," but you will need someone who understands wiring to help you, or you will need a crash-course to learn yourself.

You should start with finding the wiring diagrams for your bus. you can find links on this website to locate them. Even if you don't understand them, the person(s) who help you will benefit from them.

If your panel is like mine, there will be "hot" terminals on it that feed power to all the different systems. You will need to rewire the leads for the lights from these terminals.

without actually being there, it will be hard for anyone to give you any real assistance on what exactly to do, unless you have Google Glasses.
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