I am going thru a dead shift selector panel issue.
According to the dealer mechanic who has serviced this bus many times when it belonged to the school board he indicated the pink wire #124 tends to break open near the transmission.
Bus in question is a 99 Amtran RE.
I also found some great troubleshooting tips for WTEC 2 & 3 shifters over at http://www.transmissioninstruments.c...eshooting.html
Mine is a WTEC 3, single digit display.
Here is a cut and paste from the above (link) tech tip.
Instructions for WTECIII system [ single red digit on Your shift selector ]
Have You recently replaced battery and accidentally swapped battery terminals? If "YES", ECU maybe fried beyond repair. If "NOT", locate the ECU (in most RV's is near shift selector, close to VIM Module or, mostly on Trucks, close to transmission - just follow bundle of wires from transmission). Disconnect the battery first
, then unplug all three connectors from ECU and reconnect battery. Closely check the GRAY connector for numbers. Insert test lamp leads into corresponding connector sockets: 1 and 32 then 16 and 17.
Next turn "ON" Ignition switch and insert test leads to 17 and 26. If cavity #26 is blank, use BLACK connector socket #4. Lamp must glow brightly.
#17; #32 = BATTERY GROUND; #1; #16 = BATERY POWER; #26 gray or #4 black = IGNITION
Next turn ignition and battery "OFF", reconnect GRAY ECU connector only, then reconnect battery and turn "ON" ignition. Then very carefully touch gold plated pins #16 and #32 [ on ECU for BLACK connector ] with lamp test leads. Lamp must glow bright. Then use a Voltmeter to check 5V on pin #3 [ on ECU for BLACK connector ] against chassis ground. DO NOT use test lamp!!! If no 5V is found on pin #3, ECU is defective.
Also check socket #3 on BLACK connector with Ohmmeter against chassis ground. Must be Must be over 4k ohms
Shift selector can be check using ordinary 9V battery and hookup wire. Connect the 9V battery using hookup wire, which you may have to slightly bent on the ends so they can hold inside BLACK connector sockets. Connect Minus terminal to #32 and positive terminal to #3 and #16. After power "UP" all segments and RED LED [ Mode ] will be illuminated for 8 second and then display will show " cat eyes ". If one pushbutton "D","N" or "R" is hold down during power "UP", display will show "d", "N" or "R" for 2 second only. This way, You can check pushbutton switches.
If display will not be illuminated, maybe defective shift selector or harness. To check out harness, You must disconnect connector located
1/2' from selector. Then remove strain relief [black plastics ] from on vehicle harness connector and check closely rear side for letters.
"P" = GROUND "R" = POWER "N" = SENSOR POWER
Insert 3 short lengths of hookup wire into sockets "P", "R" and "N" and use a voltmeter to check voltage between "P" and "R" and between "P" and "N" if You using 9V battery. If ECU and battery still connected, insert lamp leads to "P" and "R", then turn ignition "ON" and with voltmeter check for 5V in socket "N".
If You do have voltage and there is no display, shift selector is most likely defective. If You do have voltage on ECU pins and not on the shifter connector, a defective harness is indicated.
Check continuity with Your Ohmmeter between "P" and chassis ground. Should be less than 1 OHM. If the meter reads "open", (Infinate resistance) find a good ground in the cabin, cut "P" wire 3" from connector and reconnect with new ground.
If missing 12V - "R", found "ignition" power, cut "R" and reconnect with "ignition" power. If missing "N" [ 5v ], cut "N" and reconnect with "ignition" power.
12V will not damage the shift selector. If one of three last steps will power up the shift selector but no response to commands, You may have additional harness damage or defective ECU or shifter. In this case, You can send ECU + shifter for free testing [You pay for shipping only].
Oh yeah, my first post...finally bought a bus!
Drove it all the way home from Louisville to Miami without a hiccup only to get back in it a few days later and it won't start. Check Trans light is "ON", on dash.
Let's see how this goes.