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07-22-2015, 10:05 AM
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#1
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4 Rivet Member
1991 30' Airstream 30
San Francisco
, California
Join Date: Aug 2013
Posts: 463
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Electrical help please
I hate to ask for ideas before digging through everything, but I'm heading out on a long road trip on Friday and need this fixed!
I was working on my floor the night before last, and left some of the interior lights on as I worked my way out the door thinking that I could just disconnect the house batteries to turn off the lights when I finished up. When I went to do this, the lights states on...odd, but I was tired. I disconnect the main batteries, lights still on, then the house as well...lights off. I think the relay that connects the two must have been on- it's an on off switch on the 94 diesel dash, not a momentary- better check that one.
Last night I had to move it, and when I turned on the lights, the headlights go on, but the dash and front marker lights cycle on for a couple seconds and then foo for a longer time and I can hear a relay click. The rear marker lights do not come on at all.
Last odd thing- the air parking brake was not fully on? When I turn it on, I hear the usual hiss, but it was not being consistent.
Any ideas? Thanks, Sebastian
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07-22-2015, 10:18 AM
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#2
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Rivet Master
1995 30' Excella
Bowie
, Maryland
Join Date: Apr 2005
Posts: 2,345
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Sounds like you ran down your engine battery. Apparently some of the interior lights are wired to that instead of the coach system. In my B190, the lights that were originally dome lights in the Ford van were still wired to the engine battery.
__________________
1995 Airstream Classic 30' Excella 1000
2014 Ram 2500 Crew Cab with Cummins 6.7L Diesel
Sold but not forgotten: 1991 Airstream B190
Sold: 2006 F-250 6.0L Powerstroke Supercab
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07-22-2015, 10:22 AM
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#3
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Rivet Master
1982 31' Airstream 310
champaign
, Illinois
Join Date: Oct 2012
Posts: 4,072
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I imagine you've probably already done this but items 2 and 3 sound like funky ground straps somewhere. Have you gone through and cleaned up your straps to the frame?
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07-22-2015, 11:07 AM
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#4
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Rivet Master
Currently Looking...
1995 36' Classic 36
Ludington
, Michigan
Join Date: May 2011
Posts: 1,662
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Electrical help.
The aisle lights are on the chassis batteries and switch on from the switch on the dash. They are intended to provide low floor lighting while driving. I put Led bulbs in them so they can be on for a long time without drawing down the batteries.
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07-22-2015, 11:13 AM
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#5
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Rivet Master
Currently Looking...
1995 36' Classic 36
Ludington
, Michigan
Join Date: May 2011
Posts: 1,662
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Electrical help.
All the chassis electrical goes through the panel in the front left. There is a hot bus and a key on bus. A solenoid turns on the key on bus. It's located at the top of the panel. All of the chassis electrical goes through breakers on that panel. They auto reset. You probably have a short that is tripping a breaker.
Re torque all of the nuts on the breakers. At some point you will probably want to go through them and clean up the connections.
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07-22-2015, 11:20 AM
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#6
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Rivet Master
Currently Looking...
1995 36' Classic 36
Ludington
, Michigan
Join Date: May 2011
Posts: 1,662
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Electrical help.
The parking brake is pretty simple. It's a spring actuated safety brake. A large spring applies the brake. Air pressure releases the brake. The parking knob on releases air pressure causing the brake to set. With the parking brake knob off, air pressurized the cylinder retracting the spring. If you loose air pressure the brake is applied regardless of the knob position. Lubricate the pull cable from the air cylinder to the brake on the rear of the transmission.
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07-22-2015, 02:56 PM
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#7
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4 Rivet Member
1991 30' Airstream 30
San Francisco
, California
Join Date: Aug 2013
Posts: 463
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Thanks for the ideas team! I had a look at it with a clear head and found the issue. When you have the dash rocker switch for connecting main and house for starting with a low main battery in the "on" position, it causes all kinds of problems! First thing I did was touch the solenoid...warm. Check voltage and it was on. Turn it off, and turn the lights on...problem solved.
That really freaked me out!
I will install a relay and direct power to run the AC condenser fans before my trip- that is what was heating up the wires behind the dash.
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07-23-2015, 05:16 AM
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#8
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Rivet Master
Currently Looking...
1995 36' Classic 36
Ludington
, Michigan
Join Date: May 2011
Posts: 1,662
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Speaking of warm solenoids, I replaced my coach battery solenoid with one of these:
http://www.bestconverter.com/BR100-B...0MIX8oR.mailto
Zero draw when it's on.
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07-23-2015, 06:32 AM
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#9
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Rivet Master
Currently Looking...
1995 36' Classic 36
Ludington
, Michigan
Join Date: May 2011
Posts: 1,662
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Quote:
Originally Posted by SebasSF
Thanks for the ideas team! I had a look at it with a clear head and found the issue. When you have the dash rocker switch for connecting main and house for starting with a low main battery in the "on" position, it causes all kinds of problems! First thing I did was touch the solenoid...warm. Check voltage and it was on. Turn it off, and turn the lights on...problem solved.
That really freaked me out!
I will install a relay and direct power to run the AC condenser fans before my trip- that is what was heating up the wires behind the dash.
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Both mine have a relay that powers the fan and compressor clutch.
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07-23-2015, 08:19 AM
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#10
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4 Rivet Member
1991 30' Airstream 30
San Francisco
, California
Join Date: Aug 2013
Posts: 463
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Thanks Kota, I found the wire that ran the condenser fans was spliced in just upstream of the thermostat. Not good, so it had a relay now. Ready to hit the road on Friday for several thousand miles.
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07-23-2015, 09:17 AM
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#11
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Rivet Master
Currently Looking...
_
, _
Join Date: Mar 2008
Posts: 2,385
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Have a fun and safe trip!
__________________
May a Firefly land upon your shoulder
and bring you good luck, good fortune, and abundance.
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07-23-2015, 11:14 AM
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#12
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Rivet Master
Currently Looking...
1995 36' Classic 36
Ludington
, Michigan
Join Date: May 2011
Posts: 1,662
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Quote:
Originally Posted by SebasSF
Thanks Kota, I found the wire that ran the condenser fans was spliced in just upstream of the thermostat. Not good, so it had a relay now. Ready to hit the road on Friday for several thousand miles.
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Keep us posted. We are still in Michigan at my folks. Going to park at a local campground so Ann can escape for a few days. Pretty primitive. Beach, Hot tub, pool, cable, wifi, 50 amp, sewer, club house, and golf cart rental...
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07-23-2015, 03:39 PM
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#13
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Rivet Master
1984 34.5' Airstream 345
Foothill Ranch
, California
Join Date: Mar 2010
Posts: 4,695
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If you don't own one, a Powerprobe is a must have thing for dealing with this stuff!
I have the 3, but they just brought out a 4..
You can find new Powerprobe 3's for under $100 on Ebay... couple that with the ECT2000 short finder and you have a suite of electrical diagnostic tools that will pay for themselves over and over!
Power Probe, Inc.
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07-24-2015, 01:01 AM
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#14
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4 Rivet Member
1991 30' Airstream 30
San Francisco
, California
Join Date: Aug 2013
Posts: 463
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Hey Kota, can you adjust the parking brake? Mine is skipping and scared the crap out of me...moved forward till it hit the curb after I got out and closed the door. Good thing I curbed the tires!
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07-24-2015, 04:53 AM
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#15
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Rivet Master
Currently Looking...
1995 36' Classic 36
Ludington
, Michigan
Join Date: May 2011
Posts: 1,662
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Electrical help please
I don't believe there is any adjustment and they don't wear out unless they are dragging. I would pull it apart and clean/inspect everything parts are cheap and easy to find. They used that brake on about every school bus and garbage truck out there. The cable from the air cylinder to the brake is often the culprit. Good to have it working properly as its your backup is you loose all air pressure.
My 94 needs some attention too. I always block a tire just out of habit.
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