Diagram for boost switch.

[CapnDirk]

Have actually made progress in the last week on wiring issues.  Winnebago sent me a full pack of wiring diagrams for the 88 Suncruiser.  I'm working on the battery boost circuit but try as I may, can not find it in any (chassis, body, auto) diagrams.  A small white wire from the solenoid to the switch shows in one diagram but ends with a note "see auto diagram #yada" I can not find that wire in the other diagram, or the dual battery switch in any one of them (at least on what I have)


Any experience or pointers would help.  I know the white wire on the switch probably goes to the solenoid, but I'm trying to sort out the other two.


Thanks

[CapnDirk]

Update.  From another forum and thread I learned that the Dual Mom switch goes out to the solenoid on white from the middle terminal.  12V supplied on the momentary side by coach batteries in case chassis battery is dead, and 12V supplied to the other side of the switch (latch) by the chassis battery.  This made sense as if the chassis battery is dead, there would be no available 12V to fire the solenoid and join the batteries together (more on joining in a moment).


Momentary worked fine, but lock side not.  12V wire (black) attached to that side went from the switch, to a molded splitter and up to a big wiring loom above the speedo, the other leg of the spliter hanging down loose above the gas pedal with a female (stock) terminal.  Jumping 12V to that had it working (yippie I don't have to buy a switch).  So, still need wiring schematic off the dual Mom switch to determine where it was supplied, and if anyone knows where the other side of that splitter goes, I'm all ears.  Since it is a supply, and not switched it would likely be something key on?  Can't think of anything not working.


About the joining part, in working with the heater problem I found that high speed on the fan is from another circuit that comes from a circuit breaker fed by the chassis battery side of the battery solenoid (that's stock) however, the cable from the solenoid to the chassis battery was gone so no supply to the heater hi circuit, and no way to join the batteries together.  That's been fixed.

[EldoradoBill]

Heres one for future reference (thread searchers)


Bill

[CapnDirk]

Thanks Eldo.  I wonder if this wire use to be on the back side of the ignition switch? (not something easily seen).   No place to plug into the fuse panel as the only available slots take a male terminal not female. 


Damn....  Wheres a spare motorhome when you need one?

[DaveVA78Chieftain]

You have to contact Winnebago to get the actual wiring diagrams.

[CapnDirk]

I have them Dave, that's what I was referring to in the first post.  The diagrams show the solenoid, but not the dual momentary switch.

[DaveVA78Chieftain]

Winnebago uses different diagrams for different groups of information. 
For example, 1990 Itasca Suncruiser M31RQ:
On pdf page of 3 of the Body Wiring Diagram, the 16 gauge white wire from the solenoid goes to pin 1 of a plug.  Pin one on the other side of the plug is a 14 gauge purple wire that refers to note 1.  Note 1 says you need Winnebago Automotive (interface) wiring diagram 91112-01-000 to see the remainder of the circuit.  Unfortunately, Winnebago does not post that drawing on their web site so you have to get it directly from Winnebago via e-mail.

[EldoradoBill]

I see on the diagram I have, 3 wires on the back of the switch, LR, LS, KE on terminals 1 2 and 3 respectively.

[CapnDirk]

Bill, can you tell me which drawing that is?  I spent another hour yesterday looking at my diagrams that Winnebago sent me, and no three way switch.  I have chassis, body, auto, and front body diagrams, and none show the switch. 


The LR line is the one to the solenoid, due to an incident yesterday of the switch falling apart when I went to insert it in the dash, I arced the contact to ground and blew a fuse.  I now have no power on the orange wire/momentary side.  All fuses in the fuse panel (forward of my left foot) are good.  So, another need for the diagram.  I've looked for both color coding and designation (ie LR etc) and can not find the switch on the diagrams.

[CapnDirk]

AAAAARRRRRGGGGHHH!!!


Well, I actually found a reference to the battery changeover switch.  I have spent hours on the chevy Auto and chassis diagrams.  There is no sign of the switch.  Just for giggles I checked the John Deere auto diagram and there it is!  So now I can chase this orange wire to find out why I have no power to the switch on the momentary side.

[EldoradoBill]

Its labeled "Wiring install front end". Page with the chassis fuse blocks, drwg 98292.

[CapnDirk]

Thanks Bill, I'll look it up.


On another amusing side trail, I found out a few minutes ago while trying to fix the burnt out battery disconnect relay light (on all the time) that the relay is locked on.  A momentary signal to both small wires on it working fine off the dash switch, but its 12V through no matter.


I swear, I'm going to write a book!  Oh wait!  I have!  it's in various chapters around the forum!        :)rotflmao