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Electrical Discussion of preventative/corrective maintenance and other technical issues regarding your coach's electrical system.

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  #21  
Old 11-11-2010
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Randy Dupree Randy Dupree is offline
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Quote:
Originally Posted by Ernest Ekberg View Post
The early PTs had 5 batteries- 4 in curbside tray tied together and 1 in street side forward compartment for generator. Mine are that way. I'd like to add a couple more batteries, but I am electrically challenged
Correct,thats the way my 84 was.
Its been years,but i think i had 2 engine batteries and 4 house and 1 gennie battery when i got done,
My 84 came with a PACs inverter,which was rare indeed in 84.
I believe that most had the rediline generator.
I'm sure the 82 did.
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  #22  
Old 11-11-2010
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The early PT schematic found here: http://www.wanderlodgeownersgroup.com/downloads/Master%20Wiring,%20Chassis%201.PDF shows a 4/0 wire running from the insulated stud in the engine compartment (where the all the positive leads of the batteries are tied together) all the way up front to an insulated stud near the under-dash battery disconnect switch. From there it feeds power to the disconnect switch via another 4/0 wire.
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1991 40' WLWB-WTB
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1991 40' WB ...From 2008 - Present
1984 ½ PT-36 .From 2000 - 2008
1973 FC-31 .....From 1991 - 2001
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  #23  
Old 11-11-2010
LDM680 LDM680 is offline
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Default Low Voltage Wiring - 82 PT

I am not sure where I copied this pdf from but it shows the 12 Volt wiring from the batteries to the load centres for the early PT's. The original date block of the drawing is 1982 with the final revision occurring some time in 1986.

Perhaps this drawing, when read with the drawing the drawing referred to by John Wyatt, may assist you in your quest for low voltage information of your coach.
Attached Files
File Type: pdf Low Voltage Wiring (82-86 Pusher).pdf (166.3 KB, 304 views)
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  #24  
Old 11-11-2010
oldmansax oldmansax is offline
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THANKS TO EVERYBODY WHO SENT ME WIRING DIAGRAMS!

After reviewing all the diagrams, it appears I SHOULD have a battery disconnect between the house batteries and the rest of the coach. That is probably where the wiring changes from one large wire to the smaller ones at the load centers.

Does anyone know the original location of the disconnect?

I didn't have any time to work on the coach today so I haven't looked for it.

Thanks!

TOM
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  #25  
Old 11-11-2010
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Tom, do you have the master disconnect by the parking brake knob under the dash?
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  #26  
Old 11-11-2010
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Ernie, yes I have it but it only has the smaller (looks like #6 maybe) wires on it. If I am reading the diagrams right, that disconnect switches the coach systems (headlights, tail lights, gauges, etc). There should be another one that switches the house systems (interior lights, LP heaters, 12V refrigerator supply, etc).

If I turn off the disconnect by the parking brake knob, all of the house systems still work.

TOM
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  #27  
Old 11-11-2010
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in one of the overhead compartments on the drivers side there should be a switch,an electronics master.
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  #28  
Old 11-12-2010
oldmansax oldmansax is offline
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Quote:
Originally Posted by Randy Dupree View Post
in one of the overhead compartments on the drivers side there should be a switch,an electronics master.
Thanks Randy. I'll look for it tomorrow.

TOM
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  #29  
Old 11-12-2010
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Hi Tom,

I attached a drawing that appears to show the 82-83 PT 12 volt distribution circuit. The battery wiring in this drawing is different than what’s in the schematic I referenced earlier. It also looks like they may have used smaller gauge wire in the 82-83 PT’s.

As Doug noted earlier in post #6, there are several high current Solenoids (contactors) in the 12 Volt system. On my 84 ½ PT-36 those solenoids picked up to pass high current 12 volts to the bus bars, etc. There were at least 3 of those round silver solenoids behind the drivers side head lights and at least 1 in the overhead panel in the front cap of the bus above the steering wheel. There were also at least 2 in the compartment behind the louvered access panel that’s inside the back wall of the engine compartment near the muffler - that compartment also held the battery chargers. Like Doug, I had one of those continuous duty solenoids go bad on my 84 ½. The bad solenoid still passed some current and voltage but it was dropping several volts across it’s contacts. For a dropping voltage problem I would at least check across all of those solenoids to see if the voltage is dropping across one or more of them.

As Randy pointed out, in addition to the main 12 volt disconnect switch that’s by the emergency brake knob you should also have an electronic master switch that powers things like the radio memory, 12V refrigerator supply, etc. My electronic master was in the last aircraft style overhead cabinet on the driver’s side just before the kitchen area.
Attached Files
File Type: pdf Wanderlodge Charging Circuit 82-83 PT.pdf (88.2 KB, 291 views)
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1991 40' WB ...From 2008 - Present
1984 ½ PT-36 .From 2000 - 2008
1973 FC-31 .....From 1991 - 2001
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