102c3 Dash Switch Wiring

[Jcparmley]

Hello All

I am trying to figure my dash wiring.  I have a wiring manual but it dosen't tell me what color wires go on what pin on the back of my switches.  Does anyone have a better diagram or pictures or something that can help me figure out what color wires go on what pegs in the pack of the switch?  Thanks

[jraynor]

Hello All

I am trying to figure my dash wiring.  I have a wiring manual but it dosen't tell me what color wires go on what pin on the back of my switches.  Does anyone have a better diagram or pictures or something that can help me figure out what color wires go on what pegs in the pack of the switch?  Thanks

First off, Do you have the complete set of wiring diagrams? second, what year and unit number is yours? This plays a role in determining what resources can be used.

Do you have any pictures as well? They are useful for matching diagrams

[bevans6]

My MCI has all black wiring and each is labeled with a metal tag with the circuit number stamped on.  Did they change that by your generation of bus?

[luvrbus]

My MCI has all black wiring and each is labeled with a metal tag with the circuit number stamped on.  Did they change that by your generation of bus?

My D is colored and numbered all firggin pins and plugs with 8 pages of schematics

[Jcparmley]

I purchased a pdf manual and wiring diagrams.  My bus is a 1989 MCI 102c3.

First off, Do you have the complete set of wiring diagrams? second, what year and unit number is yours? This plays a role in determining what resources can be used.

Do you have any pictures as well? They are useful for matching diagrams

[lvmci]

1989 TMC 102C3, #7417, lvmci...

[jraynor]

I purchased a pdf manual and wiring diagrams.  My bus is a 1989 MCI 102c3.

So i plan replace all of my switches as some are broken, some are different types etc. I have had to stare through countless diagrams to find what i am looking for. Some of the stuff is pretty basic understanding of how the switch operates (SPST, SPDT, DPST, DPDT) and then to find which is hot. From the diagrams, you can follow the circuits to where it will have a >#>. This will be the pin in the harness plug. It will also have a P# above it as well which tells you the plug number. you may be lucky and might be able to match your dash to the Group C Diagrams. This will tell you the plug numbers and should also show you what each panel has, and show you the pins that each plug has and some color coding as well. Mine was modified afterwards so the diagrams that are available now show more than what mine have in it so they arent that "correct" so to say.

See the picture: I colored the switches Yellow, the P-4 connector Blue and the P-5 connector Green. This is from the master schematic which for your 102c it depends on which which unit# yours is will either be drawings 11-A4 through 11-A6 or 11-A7 through 11-A9. The only difference may be the defrost but im not sure.

If the circuit is something specific that you are working, i.e. the headlamps, then you can find that specific drawing and possibly get more information.

Either way, it is a combination of Group C drawings, master drawings or specific drawings, and knowing how the switch operates/trail and error.

There is another post on unit number. I found mine at the end of the VIN and stamped on the front wall of the first cargo bay near the center return duct. not 100% sure that this is the unit number or not still

Which switch are you trying to figure out?

[luvrbus]

I bought all new panels and switches for my D from Sam they were pretty much plug and play till I got to the fast idle, cruise and kneeling that part took me 2 weeks 

[jraynor]

I bought all new panels and switches for my D from Sam they were pretty much plug and play till I got to the fast idle, cruise and kneeling that part took me 2 weeks 

Were they a new set for a D or a used set? i assume used. But Sam no longer has parts for any 102A series. Do you still have you old panels?

[luvrbus]

They were new Sam had them stashed away,I gave the old panels to a friend of mine that wanted all the switches for his C

[Jcparmley]

Here is what my wire schematic looks like.  It dosen't tell me what color goes to what pin on the back of the switch.

I purchased a pdf manual and wiring diagrams.  My bus is a 1989 MCI 102c3.

[jraynor]

Here is what my wire schematic looks like.  It dosen't tell me what color goes to what pin on the back of the switch.

First issue you have there is that the I-2 drawings goes to the 96B3 and 102A3 Models. Be sure to match the drawing application to your bus before you get too deep in the drawing. You need Drawing C-I-6 and C-I-7. I don't even have page 6 in my set

[buswarrior]

Are those schematics not faithful to the orientation of the switch connections?

Those diagrams should look just like the back of the switches.

Check the non-symetrical one to confirm if you are looking thru the switch from the front, or looking at it from the back.

This is a test of your spacial awareness, and other high falutin' brain/eye functioning.

Alzheimers? It's ok, you already forgot so you won't feel bad.

happy coaching!
buswarrior

[dj]

hey guys I got a silly assed question about that panel    does anyone know where I can get one for my 1988 102A3?   the pervious owner removed it before I got the bus and he couldn't find it or tell me why he removed it....its for the cruise dash lights ect     any information would be GREATLY appreciated    I do have a call into Luke @ US coach so maybe he has one haven't heard back yet...thanks again

[dj]

hey guys I got a silly assed question about that panel    does anyone know where I can get one for my 1988 102A3?   the pervious owner removed it before I got the bus and he couldn't find it or tell me why he removed it....its for the cruise dash lights ect     any information would be GREATLY appreciated    I do have a call into Luke @ US coach so maybe he has one haven't heard back yet...thanks again